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ACD PracticeAdaptive practice with 38 question types, most of them hands-on, that builds understanding: the Learning Map, the tutor and progress reports.$67.00 per child / year
MDAMathematical Diagnostic Assessment: where each student stands, skill by skill. Every student who practises takes it.$12.00 per child / year
Models & ToolsManipulative models and measuring tools to teach with freely, live with the class.$19.00 per child / year
ACD Concept LabBuild the idea, step by step.$35.00 per child / year

Looking for manipulatives you can hold? See MathBox: an individual box or a classroom box for each grade.