Tank, Bonnie
Teaching Arithmetic Lessons for Addition and Subtraction : Grades 2-3. - Sausalito, CA : Math Solutions Publications, 2001.
0-941355-32-2
Addition--Study and Teaching (Primary)
Subtraction--Study and teaching (Primary)
Teaching Arithmetic Lessons for Addition and Subtraction : Grades 2-3. - Sausalito, CA : Math Solutions Publications, 2001.
0-941355-32-2
Addition--Study and Teaching (Primary)
Subtraction--Study and teaching (Primary)