Wright, Tracey.

Survey questions and secret rules : collecting and sorting data / Collecting and sorting data Tracey Wright, Jan Mokros. - Meno Park, CA : Dale Seymour Publications, 1998. - vi, 20, 136 p. : ill. ; 28 cm. - Investigation in number, data, and space .

"Developed at TERC [Technical Education Research Centers], Cambridge, Massachucetts." "Grade 1."

ISBN: 1572326964

Subjects--Topical Terms:
Set theory--Study and teaching (Primary)