A set of ten teacher-prepared Learning Activity Packages (LAPs) for individualized instruction in topics in pre-algebra, the units cover the decimal numeration system; number theory; fractions and decimals; ratio, proportion, and percent; sets; properties of operations; rational numbers; real numbers; open expressions; and open rational expressions. Each unit contains a rationale for the material; a list of behavioral objectives for the unit; a list of resources including texts (specifying reading assignments and problem sets), tape recordings, and commercial games to be used; a problem set for student self-evaluation; suggestions for advanced study; and references. For other documents in this series, see SE 015 193, SE 015 195, SE 015 196, and SE 015 197. (DT)