Analysis of variance (ANOVA) is a statistical analysis tool that separates total variability found within a data set into two components: random and systematic factors.

Jeff Tompkins is a writer and teacher of English as a Second Language living in New York City. He was born in Hartford, Connecticut, in 1967 and was educated at Brown University and University College ...

Schools are required to test the progress of their English learners each year to determine whether they still need language instruction services or can exit out of such programs. In close to 40 states ...