THIS TEACHER'S GUIDE IS DESIGNED FOR USE WITH AN ELEMENTARY SCIENCE STUDY UNIT ON "PEAS AND PARTICLES" WHICH DEALS WITH LARGE NUMBERS AND ESTIMATIONS. ITS PURPOSE IS TO GIVE ELEMENTARY SCHOOL CHILDREN AN UNDERSTANDING OF WHAT LARGE NUMBERS MEAN THROUGH INFORMAL ACTIVITIES INVOLVING FAMILIAR OBJECTS. THE MATERIAL HAS BEEN FOUND SUITABLE FOR GRADES 3-8, BUT IS RECOMMENDED FOR GRADES 4-6. INFORMATION IS INCLUDED ON (1) PREPARATION AND MATERIALS, AND (2) SCHEDULING. VARIOUS TEACHING SUGGESTIONS ARE OFFERED. REFERENCES FOR THE TEACHER AND FOR THE CHILDREN ARE PROVIDED. THIS DOCUMENT IS AVAILABLE FROM MCGRAW-HILL BOOK COMPANY, WEBSTER DIVISION, MANCHESTER ROAD, MANCHESTER, MISSOURI 63011. (DS)