Since many of the uses of glue involve paper, glue sticks may work better than liquid glue.
Small cube that has one of the numerals 1, 2, 3, 4, 5, 6 on each face.
Typically this is used to separate hamburger patties, but because it is small and semi-transparent, this is a helpful tool for geometric investigations.
Rulers with both centimeter and inch units will be used. Rulers can also be used as a straightedge.
Any way for students to create work that can be easily displayed to the class. Examples: chart paper and markers, whiteboard space and markers, shared online drawing tool, access to a document camera.