International School Assessment Results
Every 3 years, 10,000 students in each of 40 nations take the Program for International Student Assessment (PISA). We administer the International School Assessment (ISA) each year at 3rd, 5th, 7th, and 10th grades. Because PISA and ISA are related, we can compare ISB students with those of similar backgrounds in the nations that consistently perform best on the PISA. The table below shows the results from the most recent PISA testing, plus those from the USA.
| Reading | Math | |
| International School Bangkok | 579 | 602 |
| Finland | 536 | 541 |
| Canada | 524 | 527 |
| Korea | 539 | 546 |
| United States of America | 500 | 487 |
We also compare the performance of our students on the ISA with those from the 180 International Schools that employ this assessment.
The table below displays how ISB compares.
Percentile Ranking of Mean ISA Scores for ISB
vs.
Other International Schools for the past four years
| Grade | Math | Reading | Narrative Writing | Persuasive Writing |
| 3rd | 75% | 80% | 60% | 50% |
| 5th | 79% | 81% | 70% | 62% |
| 7th | 80% | 73% | 68% | 62% |
| 10th | 81% | 56% | 61% | 54% |
The table can be interpreted as follows. In 3rd grade math, ISB placed at the 75th percentile among the 180 comparison International Schools. In other words, the mean 3rd grade math score was higher than ISB in 25% of International Schools and lower in 75%.
