BASIS Schools Remain Top Highest Ranked School Systems Measured by Worldwide Test

Results Released for OECD Test for Schools (Based on PISA)

May 22, 2015, 17:48 ET from BASIS.ed

SCOTTSDALE, Ariz. and TUCSON, Ariz., May 22, 2015 /PRNewswire/ -- Students at BASIS schools once again tested above the highest-ranked school systems in the world, as well as substantially above U.S. students, on the OECD Test for Schools (Based on PISA).

Six BASIS schools were eligible to participate in the OECD assessment -- BASIS Chandler, BASIS Flagstaff, BASIS Oro Valley, BASIS Peoria, BASIS Scottsdale, and BASIS Tucson North. Overall, BASIS students outperformed every educational system in the world in reading, mathematics, and science, and had a higher percentage of students scoring in the highest proficiency levels in every subject—higher than Shanghai (the highest-ranked school system in the world) and much higher than the rest of the United States. 

The OECD Test for Schools (based on PISA) is a student assessment tool geared for use by schools and networks of schools to support research, benchmarking and school improvement efforts. The assessment tool provides descriptive information and analyses on the skills and creative application of knowledge of 15-year-old students in reading, mathematics, and science, comparable to existing PISA scales.

Among the results: 

* All of the eligible BASIS schools outscored such other high scoring countries and educational systems as Shanghai-China, Singapore, Korea, Finland and Switzerland.

* The average BASIS student performed better than the top 10% of students in the U.S. in mathematics.

* The average BASIS student performed better than the top 25% of students in the U.S. in reading.

* The average BASIS student performed better than the top 25% of students in the U.S. in science.

OECD Test for Schools (Based on PISA) 2015 Mean Scores


603 – BASIS Schools *
570 – Shanghai (2012 PISA)**
527 – U.S. Private (2012 PISA)
498 – U.S. (2012 PISA)


617 – BASIS Schools*
613 – Shanghai (2012 PISA)**
496 – U.S. Private (2012 PISA)
481 – U.S. (2012 PISA)


607 – BASIS Schools*
580 – Shanghai (2012 PISA)**
519  – U.S. Private (2012 PISA)
497 – U.S. (2012 PISA)

* Average of scores for all six BASIS schools participating.

** The 2015 OECD Test for Schools is benchmarked to the 2012 PISA results.

About BASIS Schools Inc.
BASIS Schools Inc. delivers an accelerated liberal arts education at internationally competitive levels for all students. There are thirteen Arizona charter schools in the BASIS Schools Inc. family, four of which rank in the top ten best schools in the nation by the Washington Post "Challenge List", and one of which ranks #2 nationally by US News and World Report. Please visit

About BASIS.ed
BASIS.ed was founded to transform American education to the highest international level. BASIS.ed manages sixteen public charter schools, including thirteen in Arizona, two in Texas, and one in Washington, D.C. as well as two independent schools in Silicon Valley and Brooklyn. For more information please visit