Answer: timestable

AnswerCrossword Clue
TIMESTABLEArithmetic to memorize
TIMESTABLEGrade school lesson
TIMESTABLEMath memorization
TIMESTABLEArithmetic student's memorization
TIMESTABLEArithmetic lesson
TIMESTABLEElementary school math class aid
TIMESTABLEMultiplication aid
TIMESTABLEElementary school arithmetic assignment
TIMESTABLESome arithmetic to memorize
TIMESTABLEMatrix with squares along the diagonal