Calibrated Against Nothing: The Missing Count Beneath the Teacher Shortage

Section I

The Question Behind the Shortage

Every head of school has read the shortage coverage, and most have lived it: the specialist posting that draws three applications, the supply list that runs short by October, the resignation in May that will not be filled cleanly by September. The previous analyses in this series, The Hiring Squeeze (MapleRank, 2026) and Coming Home (MapleRank, 2026), took the shortage as a given and asked how a school should respond to it. This one steps back to a question that sits underneath the entire conversation and is almost never asked aloud: how many certified teachers does Canada actually have available to teach, and who knows the number?

The question sounds like it should have a clean answer. Teaching is a regulated profession in every Canadian jurisdiction. A person may not teach in a publicly funded school without a certificate, the certificates are issued by identifiable bodies, and those bodies keep registers. It would be reasonable for a school leader, or a board chair, or a journalist writing about the shortage, to assume that somewhere in that apparatus sits a number: this many certified teachers, this many of them working, this many available. The assumption is wrong, and the way it is wrong matters, because a great deal of public argument about teacher supply, including the shortage narrative itself, rests on figures that do not measure what they appear to measure.

What follows is a survey of every Canadian jurisdiction's published teacher-certification data, conducted from primary regulatory sources. The finding is consistent and, once seen, difficult to unsee. The registers are real, the figures in them are real, and the figures answer a different question than the one the shortage conversation is asking. The distinction this analysis turns on is the distinction between three populations that are routinely collapsed into one: everyone a regulator has ever certified, everyone who currently holds a valid certificate, and everyone who is actually teaching. These are not the same number. In the two provinces where the gap can be measured, they are not even close.

For a school leader, this is not a pedantic clarification. The size of the available teacher pool is the single fact that determines whether a hiring strategy is realistic, whether a shortage is structural or cyclical, and whether the supply lines mapped in the prior analyses are large or marginal. A figure that conflates the three populations can overstate the available pool by a factor that the data, in most provinces, does not even permit calculating. Reading teacher-supply statistics well begins with knowing which of the three populations a given number describes, and the sections that follow build that reading from the ground up.

Section II

What a Teacher Register Is For

A professional register is not a labour-market instrument, and most of the confusion in this area follows from expecting it to behave like one. A register exists so that an employer, a parent, or a member of the public can confirm that a named individual is qualified and in good standing, and so that a regulator can enforce conduct standards against the people it has certified. It is an apparatus of professional accountability, organised around the individual certificate, not around the labour force in aggregate. The register answers a question of the form "is this person a teacher in good standing," asked one name at a time.

This design has a direct consequence for anyone seeking an aggregate count. The register's natural total is the number of people the regulator has certified and continues to recognise, because that is the population the accountability apparatus has to cover. Whether any given certificate holder is currently employed, and where, is not information the register is built to hold, because employment is not what the certificate regulates. A certificate is a statement about a person's qualifications and standing, not a statement about their current job. The register tracks the certificate. It does not track the post.

The result is that even a complete, accurate, well-maintained register answers the wrong question for shortage analysis by construction. It can tell an enquirer how many valid certificates exist. It generally cannot tell them how many of those certificates correspond to a person standing in front of a class this term, because that fact lives with employers, not with the regulator, and is reported to the regulator only incidentally, if at all. The cleanest way to see this is to look at the two provinces whose registers are large enough, and transparent enough, that the gap between certificate and post becomes measurable. Ontario is the natural place to start, because it has the largest teaching profession in the country and publishes its membership data in unusual detail.

Section III

Ontario, Measured Three Ways

Ontario certifies and regulates its teachers through the Ontario College of Teachers, and the College publishes annual membership statistics that, read carefully, lay out all three populations side by side. The figures here are drawn from the College's 2024 statistical reporting (Ontario College of Teachers, 2024) and illustrate the general problem with a precision few jurisdictions allow.

The broadest figure is the public register. As of the 2024 reporting, 509,965 individuals appeared on the Ontario public register (Ontario College of Teachers, 2024). The register is a cumulative record, not a roster of working teachers. Alongside members in good standing, it carries those whose certificates are suspended or revoked and those whose status is listed as inactive or non-practising, a category the College introduced in January 2022 to replace the earlier labels of retired and suspended for non-payment of fees, and which the College itself described as removing the stigma of the older terms (Ontario College of Teachers, 2021). A member's qualifications and disciplinary history remain on the public register after they stop teaching, because the register exists to document professional standing rather than current employment (Ontario College of Teachers, n.d.). It is the largest number the College publishes, and it is the one least connected to the present-day workforce. Citing it as a measure of available teachers would overstate the working profession by more than double.

The narrower figure is membership in good standing. As of the same reporting, 228,951 members were in good standing (Ontario College of Teachers, 2024), meaning they had registered, paid the annual membership fee, and held a valid certificate for that year. This is the live, current, fee-paying profession, and it is the figure most defensibly described as Ontario's certified teaching population. It is less than half the register total. The difference between the two, 281,014 individuals, is the retired, the lapsed, and the otherwise inactive who remain on the historical record. Already, before reaching the question of employment at all, the choice of which register figure to cite swings the apparent size of the profession by a quarter of a million people.

The third population, the one the shortage conversation actually cares about, is the number of those good-standing members who are teaching. Here the Ontario data is more revealing than most, because the College reports where members are employed based on the information attached to their fee payment. The categories sum exactly to the good-standing total, and they distribute as follows: 98,649 members in English public boards, 40,488 in English Catholic boards, 6,461 in French Catholic boards, and 3,006 in French public boards, for 148,604 in publicly funded school boards in total. A further 3,304 fall under the category the College labels "Independent Schools," and 175 under other education organisations. The single largest remaining category, at 76,868 members, is the one the College labels "Member Paid for Self."

That final category is the hinge of the entire analysis, and it is worth stating precisely what it is and is not. "Member Paid for Self" is not an employment sector. It is a fee-payment category, describing members who remit their own annual dues rather than having them deducted by a board employer. The College does not, and on this data cannot, decompose who those 76,868 members are. The category necessarily mixes teachers employed in private schools who pay their own dues, occasional and supply teachers, members on leave, members teaching outside the school system, and members who hold a valid certificate but are not currently teaching at all. The number is precise. What it counts is not. It is the clearest possible illustration of the general rule: the register records who pays, because payment is what maintains the certificate, and it does not record who teaches, because teaching is not what the certificate tracks.

The lesson of the Ontario figures is not that the College's data is poor. It is exceptionally good, and the transparency of its categories is what makes the analysis possible at all. The lesson is that even the best published teacher data in the country, read honestly, yields a firm number for certificates and only an indeterminate range for employment. The province can say with confidence that 228,951 people hold a valid Ontario certificate. It cannot say from its published data how many of them are teaching, and the largest ambiguous category alone, at 76,868, is large enough that any claim about the working profession built on top of it inherits the ambiguity. If this is the situation in the jurisdiction with the most detailed public reporting, the situation elsewhere is unlikely to be better. It is not.

Section IV

Quebec, in Another Language, the Same Gap

The Ontario pattern might be dismissed as a quirk of one regulator's reporting conventions if it did not reproduce, almost exactly, in a different province under a different regulator in a different language. Quebec certifies teachers through its Ministry of Education, and the permanent teaching authorisation, the brevet d'enseignement, is a lifetime licence. In 2024, the figures were obtained from the Ministry not through routine publication but through an access-to-information request filed by the newspaper La Presse, which is itself a small piece of evidence about how readily available these numbers are.

The Ministry reported 229,444 valid brevets in the province. The reporting that accompanied the figure was unusually candid about what it does and does not represent. The total, the Ministry's data indicated, includes holders who are retired and even holders who are deceased, because the permanent authorisation persists on the record (La Presse, 2024). This is the Quebec analogue of Ontario's register total: a cumulative figure inflated by people who will never teach again and, in some cases, are no longer living. And when the newspaper asked the more useful question, the answer was the one this analysis keeps arriving at. The Ministry was not able to provide the number of brevet holders who were employed in the school network at the most recent start of the school year (La Presse, 2024). The regulator publishes, or can be made to disclose, how many certificates exist. It cannot say how many correspond to a working teacher.

"The Ministry was not able to provide the number of certificate holders who were employed in the school network at the last back-to-school." — Quebec Ministry of Education, in response to an access-to-information request, 2024

The reporting carried one further figure that sharpens the point rather than resolving it. Over the preceding two decades, the Ministry had issued an average of 4,297 brevets a year, totalling 85,944 (La Presse, 2024). Set against a standing total of 229,444, the inflow figure makes clear how much of the standing total is historical accumulation rather than current workforce. A researcher consulted on the figures estimated that at least 17,000 brevet holders had left the profession over twenty years (La Presse, 2024). The underlying attrition rate is documented in the work of Geneviève Sirois, an education-policy scholar at the Université TÉLUQ, who finds that between 20 and 40 percent of new Quebec teachers leave the profession within their first five years (La Presse, 2022; Sirois, n.d.); the 17,000 estimate applied the lower bound of that range. The figure is explicitly a calculation, not a count, and is presented here as such. Its value is not the specific number but the confirmation that even informed observers must reconstruct the working population by inference, because the regulator does not measure it. Sirois has put the underlying problem more bluntly than any regulator, observing that the province keeps no official data on teacher attrition at all (La Presse, 2022).

Two provinces, two regulators, two languages, and one structural absence. The convergence is what elevates the finding from an Ontario reporting quirk to a national feature. The two largest teaching professions in the country both publish a certificate total inflated by the retired and the inactive, and in Quebec's case the deceased, and both regulators, asked the direct question, say they cannot isolate the practising subset. If the analysis stopped here it would already support its central claim. But the remaining jurisdictions are not silent in the same way, and the shape of their silence is itself informative.

Section V

British Columbia, and the Limit of Even a Current Count

British Columbia is the third and last province that publishes a certificate-holder total at all, and it is in one respect the most useful of the three, because its figure is the cleanest. The province's Teacher Regulation Branch maintains a public statistics page reporting the number of valid certificate holders, and as of its early-2026 reporting that figure stood at 79,816 valid certificate holders (Government of British Columbia, 2026). Unlike the Ontario register total or the Quebec brevet total, this is a count of currently valid certificates, not a cumulative historical archive, which makes it the most directly interpretable certificate figure published by any Canadian jurisdiction.

And yet it still does not answer the employment question. A valid certificate in British Columbia is a precondition for teaching in the province's public and private schools, but holding one is not the same as occupying a post, and the province publishes no breakdown of how many of the 79,816 are employed, in what sector, or at what intensity. British Columbia demonstrates the ceiling of what even a well-designed, current, non-cumulative certificate count can tell an enquirer: it can establish, cleanly, how many people are presently licensed to teach. It cannot establish how many are teaching. The gap between licence and post survives even the best version of the count.

The three provinces that publish a certificate figure therefore arrange themselves on a spectrum of interpretability. British Columbia publishes a clean current count that still omits employment. Ontario publishes a detailed breakdown that surfaces the employment question precisely enough to show it cannot be answered from the data. Quebec publishes, under prompting, a cumulative total that openly includes the deceased. All three share the defining limitation. None publishes the number of certificate holders who teach. And these are the transparent cases. The rest of the country does not publish a usable aggregate at all.

Section VI

The Ten Jurisdictions That Publish Nothing

Beyond Ontario, Quebec, and British Columbia, no Canadian province or territory publishes an aggregate count of its certified teachers in a form usable for supply analysis. This is an absence claim, and absence claims deserve caution, so it should be stated precisely: a survey of the certifying authorities in Alberta, Saskatchewan, Manitoba, Nova Scotia, New Brunswick, Prince Edward Island, Newfoundland and Labrador, and the three territories located no published aggregate certificate-holder figure in any of them. What these jurisdictions publish instead is a public registry that confirms the status of named individuals one search at a time, which is the registry's proper accountability function and is of no use for counting the profession.

The reasons the count is missing vary by jurisdiction in ways that matter for interpretation. In several provinces the senior certificate simply never expires, which removes the administrative occasion on which a count might be taken. Alberta's Permanent Professional Certificate carries no expiry and no maintenance requirement, so the province holds no natural annual moment at which valid holders are tallied; the figure is, in effect, uncomputable from the public record without a special data request. Manitoba's permanent certificates are similarly exempt from the renewal provisions that govern provisional ones. Where there is no renewal cycle, there is no recurring count, and the regulator's registry becomes a name-lookup tool rather than a statistical series.

In the Atlantic provinces and the territories, certification is administered by a departmental registrar rather than an arms-length college, and these offices publish registrar contact information and application procedures rather than statistical reports. The closest thing to a supply signal any of them publishes is a flow figure rather than a stock figure. New Brunswick is illustrative: a University of New Brunswick study published in 2024 found that about 52 percent of the province's bachelor of education graduates do not go on to teach in the province, and that only 10 percent of the program's international graduates remain to teach there (CBC News, 2024). That is a revealing number about where graduates go, but it is a flow, not a stock, and it says nothing about how many certificate holders are currently in classrooms. Saskatchewan illustrates the same trap from the opposite direction. A figure of roughly 13,000 circulates for the province, but it is not a certificate count at all: it is the membership of the Saskatchewan Teachers' Federation, which by the federation's own account comprises the teachers and school-based administrators employed in the publicly funded system, and which even counts education students as members (Saskatchewan Teachers' Federation, n.d.). Treating it as a count of certificate holders would commit precisely the substitution this analysis warns against, mistaking a tally of employed union members for the certified population, while the provincial regulator itself publishes no aggregate. The honest summary of this group is that the practising count is not merely unpublished but, in the provinces with non-expiring certificates, not routinely computed at all.

Section VII

The National Picture in One Table

Assembled jurisdiction by jurisdiction, the national picture resolves into a simple structure with a consistent gap running through it. The table below sets out, for every province and territory, the certifying authority, whether any certificate-holder count is published, what that figure actually measures, and whether the practising subset is available. The columns that matter most are the last two, because they are where every jurisdiction, without exception, arrives at the same answer.

Read down the final column, the table makes its own argument. Of the thirteen jurisdictions, three publish a certificate count and ten publish none, shown here in eleven rows because the three territories share a single line, and in every case the practising subset is unavailable. The variation is entirely in the first four columns, in how much each jurisdiction discloses about the certificates themselves. On the question the shortage conversation actually turns on, how many certified teachers are teaching, the country speaks with one voice, and that voice says nothing. The chart below renders the only part of the picture that can be charted at all: the gap, in the one province detailed enough to show it.

Section VIII

How a Number That Counts the Dead Becomes a Workforce

If no jurisdiction publishes a practising count, a fair question is how the public conversation about teacher supply proceeds at all, and the answer is that it proceeds on substitution. In the absence of the number that is wanted, the number that is available gets used in its place, and the substitution is rarely flagged because the available number is real, official, and precise. Precision is the trap. A figure carried to the last digit, sourced to a named regulator, reads as authoritative regardless of whether it measures the thing the sentence claims it measures, and a register total or a fee category can travel a long way through reporting and analysis before anyone asks which of the three populations it actually describes.

The mechanism is visible in the life of a single figure. A regulator publishes a fee-payment category, accurately labelled, inside a detailed statistical table. The figure is lifted out of the table, the label is compressed or dropped, and the number is restated as a count of teachers in some condition: not teaching, available, idle, leaving. Each restatement is small, each is made by someone acting in good faith, and the cumulative effect is a workforce figure with a provenance no one has checked, describing a population the original data never isolated. The number that began as "members who pay their own dues" arrives, several steps later, as "teachers not in the classroom," and the two are not the same population. This is not a hypothetical failure mode. It is the ordinary way an official statistic about a regulated profession migrates from its source into a shortage narrative, and the only defence against it is the reading discipline the next section sets out.

It is worth being clear about what is and is not being claimed here, because the temptation in this territory is to overstate. The claim is not that teacher shortages are illusory; the prior analyses in this series documented specific, real shortages in specialist subjects, and nothing here retracts them. The claim is not that regulators are concealing anything; they publish what their registers are built to hold and are candid, when asked, about what those registers omit. The claim is narrower and harder to dismiss: that the central quantitative fact in the supply conversation, the number of certified teachers actually teaching, is absent from the public record in every Canadian jurisdiction, and that figures answering adjacent questions are routinely pressed into service as if they answered this one. A school leader who internalises only that distinction will read every future supply statistic more accurately than most of the people producing them.

Section IX

Reading a Teacher-Supply Number Well

The practical value of the gap, for a school leader who will go on encountering teacher-supply figures in board papers, sector reports, vendor pitches, and press coverage, is that it converts into a short reading discipline. The figures are not going to improve soon; the registers are built the way they are built for reasons that have nothing to do with shortage analysis, and no regulator is likely to start publishing employment breakdowns to settle a recruitment debate. What a leader can do is interrogate each number on arrival, and the questions are few enough to hold in mind. The framework below is offered as professional reading practice, not as a regulatory standard, and it is the one element of this analysis a head of school might reasonably hand to a board before the next supply discussion.

None of these questions requires statistical training, and all of them can be asked of a number in the time it takes to read the sentence containing it. Their cumulative effect is to move a school leader from the position of consuming teacher-supply figures to the position of auditing them, which, given that the figures determine real hiring decisions, is the position the stakes warrant. A board that asks these four questions of a supply claim will, more often than not, discover that the claim rests on one of the three populations being mistaken for another, and that discovery is worth more to a hiring strategy than any single headline number.

Section X

Boundary Conditions

An analysis arguing that a widely cited category of numbers does not mean what it appears to mean owes the reader an account of its own limits, and several apply. The first is that absence of a published figure is not proof that no figure could be produced. Most regulators that publish no aggregate almost certainly hold the underlying records and could generate a count on request, as Quebec's Ministry did under access to information. The claim here is about the public record, not about what is internally knowable, and a determined enquirer with the time to file requests in thirteen jurisdictions might assemble more than the published record contains. What no one can do is read the working count off the public data as it currently stands.

The second limit concerns the figures this analysis does cite. The Ontario and British Columbia figures are drawn from regulators' own current publications and are as solid as the regulators make them. The Quebec figure is solid as to the certificate total but reaches the public through a newspaper's access-to-information request rather than routine publication, which is noted wherever it is used. The Saskatchewan figure is explicitly unconfirmed and is carried only to mark that even the secondary-source number could not be verified, not to assert it. Where a figure is softer, the analysis has tried to say so at the point of use rather than in a footnote, because the entire argument is about the difference between a number and what it can bear.

The third limit is the most important to state plainly. There exists no national instrument that fills this gap. Canada's census records field of study and occupation, and it is the nearest thing to a national dataset on the teaching workforce, but it measures a different population on a different basis: it captures people by their education credential and self-reported occupation in a periodic sample, not certificate holders by regulatory status, and the two cannot be reconciled into the practising count the registers omit. Naming it is necessary so that the gap is not mistaken for an oversight that some federal table quietly resolves. It does not. The practising count is absent from the regulatory record and is not supplied from any other public source, and that absence, not any single disputed figure, is the finding of this analysis.

Section XI

Conclusion

The most basic fact in the teacher-supply conversation, the number of certified teachers actually teaching, is published by no Canadian jurisdiction, and the figures that stand in for it answer questions no one is asking.

The broader context is worth restating, because it is what gives the gap its weight. The prior analyses in this series took the shortage as given and asked how a school should respond, mapping first why the domestic pool cannot fill specialist postings and then where an underused supply line runs. This analysis has shown that the pool itself, the quantity all of that strategy is calibrated against, is not measured anywhere in the public record. Three provinces publish a certificate total, the two largest inflated by the retired and the inactive, and in Quebec's case the deceased, and openly unable to isolate the employed, and ten jurisdictions publish no aggregate at all. The shortage is real and the registers are honest, but the number that would tell a school leader how large the available profession is does not exist in citable form, and the precise, official figures that circulate in its place describe everyone a regulator has ever certified, or everyone who currently pays dues, rather than everyone who teaches. For the leader weighing a hiring strategy against a supply claim, the implication is not discouraging so much as clarifying: the right response to a confident teacher-supply number is not to accept it or reject it, but to ask which of three populations it counts, and to notice how often the honest answer is that no one knows.

Section XII

References

• CBC News. (2024, January 24). Retirements, population rise create looming teacher shortage in New Brunswick: Study.
• Government of Alberta. (n.d.). Teacher certification.
• Government of British Columbia. (2026). Statistics about valid certified teachers. Ministry of Education and Child Care, Teacher Regulation Branch.
• La Presse. (2022, August 19). Comment fabriquer une pénurie d'enseignants.
• La Presse. (2024, October 23). Brevets d'enseignement: Québec se prive de milliers de profs qui ont quitté le navire [Reporting Ministère de l'Éducation figures obtained under access to information].
• Ontario College of Teachers. (n.d.). Tribunals glossary.
• Ontario College of Teachers. (2021, December 1). New legislation ensures only Ontario Certified Teachers can use the term OCT.
• Ontario College of Teachers. (2024). 2024 annual report [Membership statistics: individuals on the public register, members in good standing, and where members are employed based on fee payment information].
• Saskatchewan Teachers' Federation. (n.d.). STF membership.
• MapleRank. (2026). Coming home: Recruiting Canadian teachers from the international school circuit.
• MapleRank. (2026). The hiring squeeze: Why the teacher shortage reaches the private sector.
• Statistics Canada. (2022). Occupation unit group by highest level of education, major field of study, age and gender: Canada, provinces and territories (Table 98-10-0447-01).