How to Use PD to Improve Teacher Retention in International Schools

Quick answer

Professional development improves teacher retention in international schools because career growth is the single most-cited reason teachers give for leaving one school for another. ISC Research's Teacher Movement Report 2024 found "improved career prospects elsewhere" to be the top motivator. Schools that treat PD as a visible career-pathway tool rather than a compliance task see it show up as a reason to stay; schools that treat it as a box to tick don't. The difference is in how the programme is designed, not how much is spent.

Key facts

- International schools retain a given teacher for roughly 1-6 years on average; nearly half of teachers surveyed plan to move on within that window (ISC Research, Teacher Movement Report 2024, 2,539 responses across 59 countries).

- "Improved career prospects elsewhere" was the top reason cited for leaving in the same study.

- ~50% of teachers relocating to East and South-East Asia named career growth as their motivation. The same report found China's international sector grew staff recruitment by 32% since 2019 despite 0% growth in school numbers over that period, likely driven in part by schools' CPD investment.

- Losing a teacher costs an estimated $11,860-$24,930 across small to large districts in the US public system (Learning Policy Institute, 2024 data). International recruitment agencies separately charge, by industry estimates, 20-30% of salary in placement fees alone.

How is teacher retention different in international schools?

In international teaching, your best teacher is always someone else's next hire. That's the reality every leader in this sector plans around, and the data bears it out: most international schools can only expect to retain a given teacher for one to six years, with nearly half of teachers surveyed planning to move on within that window, according to ISC Research's Teacher Movement Report 2024, a survey of 2,539 educators across 59 countries.

Contract cycles, career progression, and the international mobility that defines the sector all drive this. That's not necessarily a problem to solve (some churn is inherent to international teaching), but it does mean retention has to be actively managed rather than assumed, and the cost of turnover is unusually visible in this sector: international recruitment agencies typically charge 20-30% of a placement's annual salary in fees alone, before relocation packages, flights and cover are counted on top. For an order-of-magnitude comparison, the US Learning Policy Institute's 2024 turnover calculator puts total separation, recruiting, hiring and training costs at $11,860-$24,930 per teacher in the US public system, a different context, but the same underlying cost categories apply internationally, typically at the higher end given relocation costs.

Why does professional development improve teacher retention?

ISC Research's Teacher Movement Report 2024 found "improved career prospects elsewhere" to be the leading reason international teachers give for leaving, and the IB's Well-being for Schoolteachers report (Oxford Wellbeing Research Centre, February 2024) links a sense of achievement and access to growth opportunities directly to job satisfaction and wellbeing, the drivers behind that mobility. The regional data makes the mechanism concrete: around half of teachers relocating to East and South-East Asia named career growth as their reason for the move, and China's international school sector saw staff recruitment rise 32% since 2019 despite flat (0%) growth in school numbers over the same period, a pattern likely driven in part by schools' substantial CPD budgets and individualised professional development. The takeaway is fairly intuitive: teachers who came into international education partly for professional growth notice quickly whether a school is investing in that growth or leaving them to find it elsewhere.

Mentoring is a specific lever worth naming separately, and here the evidence is stronger than the numbers usually quoted for it. The widely recycled "mentored employees stay X% longer" figures rarely trace to a primary study, so treat them with caution. What is well evidenced is Smith and Ingersoll's analysis of US national survey data (American Educational Research Journal, 2004): beginning teachers who received a comprehensive induction package, a mentor in the same subject plus shared planning and collaboration time, were markedly less likely both to leave teaching and, more relevantly for international schools, to move to another school after their first year than those who received none. That's US beginning-teacher data rather than international-school data, but the mechanism, structured support in a teacher's first term, travels directly to the international sector, where a large share of staff are new to the school every August. Gallup's broader finding that highly engaged teams see meaningfully lower turnover points the same way, and mentoring is one of the more consistent levers for building that engagement. In practice this means pairing new arrivals with an experienced colleague from day one, as a standing structure, not a line in a policy document. Mentoring and structured coaching pull in the same direction here; our guide on instructional coaching and mentoring (https://eduspark.world/blog/instructional-coaching-mentoring-teachers) covers how they differ and when to use each.

What "PD that retains" looks like in practice

Not all PD produces this effect equally. The programmes that show up in exit interviews as a reason to stay tend to share a few features:

- Visible pathways. Staff can see how completing certain training connects to a coordinator role, a leadership track, or simply recognised expertise, not just a certificate with nowhere to go.

- Autonomy within structure. A menu of relevant options within a school's priorities, rather than one mandatory course everyone sits through regardless of role or experience.

- Mentoring built in, not bolted on. New staff paired with experienced colleagues as a standing structure, not an informal hope that it happens.

- Leadership visibly participating. When senior leaders complete and reference their own PD, it signals the programme is real, not something staff do while leaders are exempt.

- A record staff can take with them. A portable, evidenced training history has value to a teacher's next career move too, and a school that helps build it, rather than locking evidence in an internal-only system, earns goodwill that shows up as loyalty while they're still there.

Building retention into your PD plan

This isn't a separate programme from your core PD strategy, it's a lens applied to the one you already have. When setting goals, auditing needs and choosing formats (our full six-step process is in how to plan a whole-school PD programme: https://eduspark.world/blog/plan-whole-school-professional-development), add one explicit question at each stage: does this also give staff a visible reason to stay? A budget conversation changes shape too once retention is on the table. See how much should an international school budget for PD? (https://eduspark.world/blog/international-school-pd-budget) for how the cost of turnover should factor into what you're willing to spend.

Leadership is still the bigger factor: PD supports it, doesn't replace it

Worth being honest about: professional development is one factor among several. Research on international teacher retention consistently places supportive leadership, teaching assignment, salary, benefits and overall school culture alongside, and often above, professional development opportunity in surveys of why teachers stay or leave. PD won't rescue retention on its own in a school with weak leadership or poor culture. What it does reliably do is remove one common reason to leave, and, done well, signal that the school invests in its people, which reinforces everything else leadership is trying to build.

Frequently asked questions

Does professional development actually reduce teacher turnover?

Research links PD opportunity to retention, though it's one factor among several rather than a standalone fix. ISC Research's Teacher Movement Report 2024 found career-growth motivations behind roughly half of teacher moves to East and South-East Asia, and it tends to matter most when paired with supportive leadership and a genuine professional growth culture, not as an isolated benefit.

What's the biggest PD-related reason international teachers leave?

"Improved career prospects elsewhere" is ISC Research's top-cited reason for leaving in its 2024 Teacher Movement Report. It's as much about visible career pathways as it is about hours of training completed.

How do I measure whether PD is helping retention?

Track it directly in exit interviews and stay interviews by asking about professional growth specifically, and watch retention trends for staff who complete structured PD or mentoring versus those who don't.

Sources

- ISC Research, Teacher Movement Report 2024: iscresearch.com

- International Baccalaureate Organization / Oxford Wellbeing Research Centre, Well-being for Schoolteachers (Feb 2024): ibo.org

- Learning Policy Institute, 2024 Cost of Teacher Turnover factsheet (US data): learningpolicyinstitute.org

- Thomas M. Smith & Richard M. Ingersoll, What Are the Effects of Induction and Mentoring on Beginning Teacher Turnover?, American Educational Research Journal 41(3) (2004): eric.ed.gov

- Gallup, Q12 Meta-Analysis (engagement and turnover findings): gallup.com

Professional development won't stop teachers leaving. But done well, it removes one of the few reasons for leaving that a school completely controls, and signals to everyone still in the building that this is a place that invests in its people.

EduSpark gives every teacher a visible, evidenced learning pathway, and gives leaders the data to see whether it's working. Book a demo (https://eduspark.world/book-a-demo), or see where this fits in a wider professional development strategy (https://eduspark.world/blog/professional-development-international-schools).