Earlier quoted context omitted.
Canada also scores highly in PISA rankings. However it is officially bilingual, has high immigration, many ESL and FSL students. Within Canada: Alberta, Ontario, British Columbia and Quebec score higher than the national average and they are the provinces with the highest in-migration.
Per Statistics Canada, Canada's immigrant population is highly educated, 90% emigrated legally, and a large percentage are Asian in origin. Is it safe to say that doesn't reflect recent (last 25 years) immigration patterns to the U.S. or to Western Europe?
I think it's an honest perspective and would have an impact on the educational outcomes of immigrant populations.