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
Attribute Games and Problems, unit was developed as part of the ESS unit to apply certain classification concepts: observation, identification, combinations, ordering and analyzing
Accessories for vibration generator (U56001) for demonstrating standing longitudinal waves in a coil spring. Consisting of angled stand rod, coil spring and connector pin for attachment of the spring to the vibration generator.