Banking on problem solving in elementary school mathematicsRobert W Wirtz · First published 1982Open the Tome
Banking on problem solving in elementary mathematicsRobert W. Wirtz · First published 1976Open the Tome
Drill and practice at the problem solving levelRobert W. Wirtz · First published 1973 · Latest edition 1974Open the Tome
Teacher's GuideRobert W. Wirtz, Morton Botel, Max Beberman, W. W. Sawyer · First published 1965Open the Tome
