Designed to help the teacher in presenting the material of unit nine's science-math strand for third graders, this supplement and ditto packet contains both group visual aids and seatwork activities for individual students. Notations in the teacher's guide indicate when the supplementary materials should be used. Concepts explored in the four kits of the unit include matter, energy, force, change, interaction, relativity, equilibrium, systems organization, variation, adaptation, reproduction, and conservation. The supplement contains pictures of such items as light bulbs, appliances, fuse boxes, wedge-type tools, gears, and simple and complex machines; these are used to help children identify concepts as well as to stimulate oral language and conceptual development. The ditto packet contains ditto masters for such exercises as addition story problems, place value work, and addition and subtraction equations. Language on all materials for classroom use is in Spanish. Worksheets for individual students are intended to be presented under supervision rather than as individual tasks. (DS)