Phase II coding: describing the studies
In Phase II, all studies were coded on the following variables: (a) mathematical
domain, (b) sample size, (c) grade level, (d) length of the intervention, and (e)
dependent measures. We also determined who implemented the intervention
(i.e., classroom teacher, other school personnel, or researchers), if fidelity of
treatment was assessed, whether posttests should be categorized as
immediate posttests, transfer measures or maintenance tests, and whether
scoring procedures for relevant mathematics performance scores included interrater
agreement procedures.