Abstract In conjunction with a large-scale PISA in Taiwan in 2006, this study utilized the Taiwan PISA team’s translated test materials and questionnaires and used the same procedures to test 2,400 students (2,339 test samples are valid), comprised of 20 10thgrade students and 20 11th-grade students of each school from randomly selected 60 high and vocational schools out of 150 schools tested in the first year, to assess the impact of the Grade 1-9 Integrated Coordinated Curriculum. The test results indicate no significant difference in science, mathematics, and reading between students who studied under the Grade 1-9 Integrated Coordinated Curriculum and those who didn’t. Among tested students, the average education period of 10th grade students (under the Grade 1-9 Integrated Coordinated Curriculum) is one year shorter than that of 11th-grade students (not under the Grade 1-9 Integrated Coordinated Curriculum), but the test results were almost identical in science, mathematics, and reading between these two groups. The testresults demonstrate that concerns that the Grade 1-9 Integrated Coordinated Curriculum would lower students’ educational ability are groundless. Based on types of schools, the test results of high school students are much better than those of vocational school students in science, mathematics, and reading. However, the tests are designed by PISA in the context of evaluating students’ modern citizenship ability and quality. In this sense, the citizenship ability and quality are similar between these two different types of schools, even though there are differences in professional abilities and special subject achievement, and this leads to the design of educational tracking for the educational system. This demonstrates that the educational equity between these two groups needs to be improved. The question of how to narrow the gap in achievement between high school students and vocational students is an important issue which will require consideration and resolution.