This curriculum is designed primarily for use in individualized classrooms where the teacher is working with an assistant, but it has also been proven effective in traditional classrooms and in remedial situations. Program four focuses on four abilities as they relate to the basic symbol system of the classroom. These are the abilities to: discriminate (match) all of the capital letters, lower-case letters, and numerals upon oral request; name them upon visual display; and print them from dictation. Part one, "Numerals and Capital Letters," contains the following: a statement of all 52 behavioral objectives dealt with in this two-part program, their hierarchical structure, and a general description of the rationale upon which they are based; and a test for each of the 28 behavioral objectives that pertain to the numerals and capital letters. Part two, "Lower-Case Letters," contains a test for each of the 24 behavioral objectives that pertain to the lower-case letters. Both parts contain standard procedures for the administration of the tests and an inventory of learning activities coded to specific behavioral objectives. (LL)