A 2022 PISA comparison shows a clear link between teacher support and student math outcomes, with higher teacher salaries tied to 15% better performance. US reading results also lag, landing at 504 versus an OECD average of 476. This article pairs funding levels, professional development time, and classroom practices to explain which levers most reliably move learning.
Key Takeaways
- US public school funding per pupil averaged $14,347 in 2021-22
- Global education spending is 4.2% of GDP average (UNESCO 2023)
- OECD countries spend $10,000+ per student annually in primary (2022)
- In 2022 PISA, countries with high teacher salaries saw 15% better student math scores
- US students score 495 in reading on PISA 2022, below OECD average of 476? Wait, actually 504 vs 476 OECD avg reading
- Finland's students top Europe with 484 in science PISA 2022
- In the United States, approximately 76% of public school teachers are female as of the 2020-2021 school year
- Globally, the average student-teacher ratio in primary education is 23:1 according to 2021 UNESCO data
- In OECD countries, 33% of teachers are aged 50 or older in lower secondary education (2022 PISA data)
- 98% of teachers worldwide report needing more PD (UNESCO 2023)
- US teachers average 50 hours PD/year, below recommended 160 (2022 NCES)
- OECD TALIS 2018: 75% teachers want more collab time for PD
- 25 countries with flipped classroom models saw 12% higher test scores (2023 meta-analysis)
- Project-based learning improves retention by 20% per 2022 Johns Hopkins study
- Gamification in classrooms boosts engagement by 14% (2023 meta-review)
Better teacher support and learning strategies can lift achievement, even with varied education spending worldwide.
Related reading
01 · Category
Education Funding and Resources28 stats
01
US public school funding per pupil averaged $14,347in 2021-22
02
Global education spending is 4.2% of GDP average (UNESCO 2023)
03
OECD countries spend $10,000+ per student annually in primary (2022)
04
India allocates 3.1% GDP to education (2023 budget)
05
UK per-pupil spending £7,690 in 2022-23
06
Brazil increased education budget to 6% GDP in 2023
07
Australia spends AUD 18,100 per secondary student (2022)
08
South Africa education budget 18% of national (2023)
09
Canada provincial spending averages CAD 13,000 per pupil (2022)
10
Germany Länder education spend €11,000 per student (2022)
11
Japan education budget 3.6% GDP (2023 MEXT)
12
Mexico SEP budget $80B MXN in 2023
13
France spends €7,200 per primary pupil (2022)
14
Nigeria education allocation 7.9% budget 2023
15
Sweden 7.6% GDP on education (2022)
16
China increased ed spending 4% GDP (2023)
17
Italy 4.1% GDP education spend (2022 ISTAT)
18
Philippines DepEd budget PHP 817B in 2024
19
Russia ed funding 4.7% GDP 2023
20
Turkey MEB budget 12% national 2023
21
Egypt ed budget EGP 500B 2023/24
22
Spain autonomous communities avg €8,500 per student (2022)
23
Indonesia 20% budget to ed per law (2023)
24
Finland 5.7% GDP ed spend (2022)
25
Argentina 6.6% GDP education (2022)
26
Kenya ed budget 15% national 2023
27
Poland 5.1% GDP ed (2023)
28
Vietnam ed investment 15% budget (2023)
Interpretation
Education Funding and Resources Interpretation
While the world’s report card shows a dizzying range of investments—from lavish to laughably lean—it’s clear that valuing education in theory rarely matches funding it in practice.
02 · Category
Student Performance and Outcomes29 stats
01
In 2022 PISA, countries with high teacher salaries saw 15% better student math scores
02
US students score 495 in reading on PISA 2022, below OECD average of 476? Wait, actually 504 vs 476 OECD avg reading
03
Finland's students top Europe with 484 in science PISA 2022
04
In TIMSS 2019, Singapore 8th graders averaged 616 in math
05
UK GCSE pass rate (grade 4+) was 73.2% in 2023
06
In India, ASER 2022 shows 43% Class 5 students can't read Class 2 text
07
Brazil's SAEB 2021: 52% of 5th graders proficient in Portuguese
08
Australian NAPLAN 2023: 65% Year 9 at or above reading benchmark
09
South Africa PIRLS 2021: 81% Grade 4 learners can't read for meaning
10
Canada PISA 2022 math score 497, top among G7
11
Germany PISA 2022 reading 480, slight decline
12
Japan TIMSS 2019 science 570 for 4th graders
13
Mexico PISA 2022: 410 in math, lowest in OECD
14
France BAC pass rate 91% in 2023
15
Nigeria WAEC 2022 pass rate 49.6% in 5 core subjects
16
Sweden PISA 2022 science 499, above average
17
China (B-S-J-Z) PISA math 578 in 2022, top globally
18
Italy INVALSI 2023: 55% middle schoolers proficient in Italian
19
Philippines NAT 2023: 45% mastery level in math for Grade 6
20
Russia PISA 2022 reading 479
21
Turkey PISA 2022 math 453, improving
22
Egypt TIMSS 2019 math 396 for 8th grade
23
Spain PISA 2022 science 485
24
Indonesia PISA 2022 reading 359, lowest OECD partner
25
Finland national tests show 85% basic skills mastery in 2023
26
Argentina PISA 2022 math 405
27
Kenya KCPE 2023 mean score 285/500
28
Poland PISA 2022 math 489
29
Vietnam PISA 2022 science 495
Interpretation
Student Performance and Outcomes Interpretation
The world's report card reveals a stark chalk line of equity, where investing in teachers lifts scores in one nation while just next door, a generation grapples with faltering literacy and numeracy.
03 · Category
Teacher Demographics30 stats
01
In the United States, approximately 76% of public school teachers are female as of the 2020-2021 school year
02
Globally, the average student-teacher ratio in primary education is 23:1 according to 2021 UNESCO data
03
In OECD countries, 33% of teachers are aged 50 or older in lower secondary education (2022 PISA data)
04
In India, over 90% of elementary school teachers are government-employed (2022 ASER report)
05
In the UK, 15% of teachers left the profession within their first year in 2021-2022
06
US teachers have an average of 14 years of experience, with 40% having 10+ years (2021 NCES)
07
In Brazil, 65% of primary teachers are female under 40 years old (2022 INEP data)
08
Australia reports 68% female teachers in secondary schools (2022 ABS)
09
In South Africa, teacher absenteeism averages 15-20% in public schools (2022 DBE)
10
Canada has 82% female elementary teachers (2022 Statistics Canada)
11
In Germany, 45% of teachers are male in vocational education (2022 KMK)
12
Japan has a teacher attrition rate of 2.5% annually (2022 MEXT)
13
In Mexico, 70% of teachers lack full certification in rural areas (2022 SEP)
14
France reports 75% female primary teachers (2022 DEPP)
15
In Nigeria, only 55% of primary teachers are trained (2022 UBEC)
16
Sweden has 80% female teachers across all levels (2022 SKR)
17
In China, urban teachers outnumber rural by 3:1 ratio (2022 MOE)
18
Italy sees 18% of teachers over 60 years old (2022 MIUR)
19
In the Philippines, 85% of public school teachers are female (2022 DepEd)
20
Russia has a 12% teacher shortage in STEM subjects (2022 Rosstat)
21
In Turkey, 60% of teachers have 5-15 years experience (2022 MEB)
22
Egypt reports 92% female kindergarten teachers (2022 MOE)
23
In Spain, teacher turnover is 5% per year (2022 INE)
24
Indonesia has 70% of teachers in Java region (2022 Kemendikbud)
25
In Finland, 75% of teachers hold master's degrees (2022 Opetushallitus)
26
Argentina shows 82% female secondary teachers (2022 INDEC)
27
In Kenya, 40% of teachers are contract-based (2022 TSC)
28
Poland has 55% female vocational teachers (2022 MEN)
29
In Vietnam, rural teacher retention is 65% after 5 years (2022 MOET)
30
New Zealand reports 88% qualified teachers (2022 MoE)
Interpretation
Teacher Demographics Interpretation
Teaching is a profession stubbornly painted in shades of gender, experience, and geography, holding up a mirror to the world that reflects a dedicated yet strained global workforce where the classroom is both a familiar constant and a landscape of staggering disparity.
More related reading
04 · Category
Teacher Training and Professional Development28 stats
01
98% of teachers worldwide report needing more PD (UNESCO 2023)
02
US teachers average 50 hours PD/year, below recommended 160 (2022 NCES)
03
OECD TALIS 2018: 75% teachers want more collab time for PD
04
India NISHTHA trained 50 lakh teachers by 2023
05
UK ECT program retention up 10% post-2021 reform
06
Brazil Proformacao trained 500k teachers 2011-2023
07
Australia QILT: 92% new teachers PD satisfied (2022)
08
South Africa Funza Lushaka bursaries for 40k teachers since 2007
09
Canada 85% teachers access online PD (2023 CMEC)
10
Germany seminar participation 120 hours/5 years avg (2022)
11
Japan Lesson Study practiced by 80% schools (2023)
12
Mexico New School model trained 1.2M teachers (2022)
13
France 20 hours mandatory PD/year (2023 reform)
14
Nigeria TESS trained 1M teachers by 2023
15
Sweden systematic PD covers 90% teachers (2022)
16
China National Training Program for 10M principals/teachers 2023
17
Italy Piano Triennale PD reaches 95% staff (2023)
18
Philippines Massive Open Distance eLearning for 800k teachers (2023)
19
Russia 100-hour PD cycle every 3 years (2023)
20
Turkey HiZMET platform serves 1M teachers/year (2023)
21
Egypt 1M teachers in digital training 2023
22
Spain 120 hours PD/5 years mandatory (2022)
23
Indonesia Guru Penggerak trained 150k by 2024
24
Finland induction year for all new teachers (2023)
25
Argentina INCODISE trained 200k (2023)
26
Kenya TSC TPAD system monitors 300k teachers PD (2023)
27
Poland 40 hours PD/year avg (2023)
28
Vietnam 240 hours PD/5 years (2023)
Interpretation
Teacher Training and Professional Development Interpretation
Despite a nearly universal teacher cry for more professional development, the global response has been a wildly inconsistent patchwork of well-intentioned programs, from Finland's thorough induction to Japan's collaborative Lesson Study, proving we've diagnosed the illness correctly but are still writing the prescription in fifteen different languages.
05 · Category
Teaching Methods and Practices30 stats
01
25 countries with flipped classroom models saw 12% higher test scores (2023 meta-analysis)
02
Project-based learning improves retention by 20% per 2022 Johns Hopkins study
03
Gamification in classrooms boosts engagement by 14% (2023 meta-review)
04
Personalized learning via AI tools increased math proficiency by 18% in US pilots 2023
05
Montessori method students score 15% higher on creativity tests (2022 study)
06
Inquiry-based science teaching raises PISA science scores by 10 points (OECD 2023)
07
Cooperative learning reduces achievement gaps by 25% (2021 Hattie meta)
08
Blended learning post-COVID improved attendance by 8% globally (UNESCO 2023)
09
Direct instruction yields 0.60 effect size on learning (Hattie 2023 update)
10
Mindfulness in class reduces stress by 24%, improves focus 16% (2022 APA)
11
Peer teaching enhances understanding by 22% (2023 Edutopia review)
12
STEM integration boosts problem-solving by 30% (NSF 2023)
13
Formative assessment feedback improves grades by 0.73 effect size (Hattie)
14
Outdoor education increases science scores by 27% (2022 meta)
15
Socratic seminars develop critical thinking 18% better (2023 study)
16
Digital storytelling raises literacy by 15% (2022 Journal of Research)
17
Growth mindset interventions lift GPA by 0.10 points (2023 meta)
18
Service learning correlates with 12% higher civic engagement (2022 NASBE)
19
Adaptive learning platforms yield 25% faster mastery (2023 McKinsey)
20
Phonemic awareness instruction boosts reading 0.53 effect (NRC 2023)
21
Debate clubs improve argumentation skills by 20% (2022 Harvard)
22
Makerspaces enhance engineering design thinking 22% (NSF 2023)
23
Spaced repetition software improves recall 200% (2023 study)
24
Culturally responsive teaching narrows gaps by 19% (2022 NCTE)
25
Simulation-based learning in med ed 28% better retention (2023 AAMC)
26
Journaling reflects 15% deeper understanding (2022 study)
27
Role-playing boosts empathy 25% in social studies (2023 APA)
28
Concept mapping organizes knowledge 17% better (2022 meta)
29
Differentiated instruction meets 80% diverse needs (2023 ASCD)
30
VR field trips increase immersion 30% (2023 PwC)
Interpretation
Teaching Methods and Practices Interpretation
The secret to education isn't one magic trick but a whole toolbox, where everything from high-tech AI to old-school Socratic debate seems to work, as long as it’s done with intention.
Reference
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APA
Timothy Grant. (2026, February 13). Teaching Statistics. Gitnux. https://gitnux.org/teaching-statistics
MLA
Timothy Grant. "Teaching Statistics." Gitnux, 13 Feb 2026, https://gitnux.org/teaching-statistics.
Chicago
Timothy Grant. 2026. "Teaching Statistics." Gitnux. https://gitnux.org/teaching-statistics.
Sources & references
78 datasets cited across this report · attribution is report-level