Conjecturing is central to the work of reasoning and proving. This task gives fourth and fifth graders a chance to make conjectures and prove (or disprove) them.
Amy F. Hillen and Tad Watanabe
Capitalize on student thinking to create opportunities to further their mathematical reasoning.
Renee Parker and M. Lynn Breyfogle
This student-friendly rubric helped improve third graders' competencies when explaining solution strategies in writing.