Math and Science MCAS Testing Dates Posted byanitapgo May 12, 2017May 12, 2017 Math MCAS: Grade 6 tests on May 18,19; Grades 3 and 4 tests on May 23, 24. Science MCAS: Grade 5 tests on May 16 and 17. Share this:FacebookTwitterEmailPrintLike this:Like Loading...