This handbook is part of a series of three, corresponding to the three grades (4, 6, and 8) at which Mastery Tests are administered. This publication was written as a resource for teachers for developing mathematics programs for students in grades 3 and 4. The Mastery Test in Mathematics at Grade 4 assesses student performance for 25 instructional objectives. The following information is provided for each objective: (1) Appropriate Materials (manipulative materials to use for exploring the concept); (2) Enabling Skills and Activities (a description of prerequisite skills and activities); (3) Sample Lessons (student activities that build toward mastery); (4) Teacher Resource Materials; and (5) Mathematics Objectives and Sample Test Items. The instructional objectives are grouped into four categories: (1) conceptual understandings; (2) computational skills; (3) problem solving and applications; and (4) measurement and geometry. Appendixes provide the sample test items for each objective, a list of suppliers of math manipulatives and resource materials, a list, by learning objective, of related computer software, and a list of addresses of software publishers. (RH)