Geometry Resource Kit, includes: double sided geoboards(12) with rubberbands, one overhead geoboard, shape tracer set, pattern blocks, over head pattern blocks, tangrams (16 puzzles), overhead tangrams, a Tangramables book, a Let's Pattern Block It book and geoboard dot papers
Number, Measurement and Space, module establishes equivalence of sets by a one-to-one exchange of objects. Eg Upsetting equivalance (destroying conservation of numbers) by adding one object to a set, or taking one away, helps introduce vocabulary for comparing quantity