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Grade One
"Introducing the Cross Number Puzzle" (Teacher Guide, Student Pages)
"Using Cross Number Puzzles to Add" (Teacher Guide, Student Pages)
Grade Two
"Representing Three-Digit Numbers" (Teacher Guide, Student Pages)
"Regrouping" (Teacher Guide, Student Pages)
Grade Three
"Arrays of Square Tiles" (Teacher Guide, Student Pages)
"Intersecting Lines" (Teacher Guide, Student Pages)
Grade Four
"Using a Multiplication Shortcut" (Teacher Guide, Student Pages)
"Connecting Multiplication and Division" (Teacher Guide, Student Pages)
Grade Five
"Investigating Input-Output Tables" (Teacher Guide, Student Pages)
"Connecting Input-Output Machines and Puzzles" (Teacher Guide, Student Pages)