Tierney, Cornelia.

Things that come in groups : multiplication and division / Multiplication and division Cornelia Tierney, Mary Berle-Carman, Joan Akers. - White Plains, NY : Dale Seymour Publications, 1998. - vi, 22, 136 p. : ill. ; 28 cm. - Investigation in number, data, and space .

"Developed at TERC [Technical Education Research Centers], Cambridge, Massachucetts." "Grade 3, also appropiate for grade 4."

ISBN: 1572326956

Subjects--Topical Terms:
Mathematics--Study and teaching (Elementary)