The 30 teacher-directed lessons in this math intervention follow a concrete to representational to abstract (CRA) instructional sequence for helping middle school students understand fractional reduction, addition, and subtraction. The teaching scripts incorporate manipulatives for modeling the fractions, guided practice, and word problems. Witzel teaches special education at Winthrop and Riccomini teaches the same at Clemson. Annotation ©2009 Book News, Inc., Portland, OR (booknews.com)