The activities in this booklet were designed to provide second grade children with opportunities to explore areas of natural interest to them while gaining knowledge and practice in math skills and with science processes. The lessons are most appropriate for the second half of the school year and are grouped into units on life science, earth-space science, and physical science. Ten mathematics skills and eight science processes are listed and indexed for the 22 activities. Each activity consists of student sheets and a teacher's guide. The teacher's guide contains information on the activities including: (1) topic area; (2) introductory statement; (3) math and science skills; (4) required materials; (5) key questions; (6) background information; (7) management details; (8) instructional procedures; (9) student procedures; (10) discussion questions; (11) activity extensions; and (12) curriculum coordinates. (ML)