Instructional and assessment activities in science and math for third graders are presented in this teacher's guide to unit nine. Focus, objectives and materials for each activity are in English and Spanish, while teacher instructions are only in Spanish. The unit's theme is "the nation as a community"; related to the theme are the four spiraling questions developed in each of the four unit kits. Kit 33 treats what the elements are, and studies heat as a form of energy and types of heat conductors. Math activities deal with forms of measurement. Kit 34 asks what alternatives the individual faces and studies magnetism. Its math activities deal with inverse relation between addition and subtraction, associative property of addition, place value of numerals, and short form subtraction. Kit 35 deals with how the individual can initiate change and pupils learn about electricity as it relates to the experiences of everyday life. Math activities deal with repeated addition as readiness for multiplication, the commutative and associative properties of multiplication, and the multiplication table for equations from 0 to 5. Kit 36 examines what happens as a result of change and deals mainly with simple machines that push or pull. Math activities continue with multiplication skills and the metric system is introduced. (DS)