Combining interactive CD technology with advanced card reading capabilities, the Radius Audio Learning System and Interactive Kits offer unique, hands-on opportunities to reinforce concepts about time, money, addition and subtraction, and problem solving.

Radius Audio Learning System
Includes 4 headphone jacks (headphones sold separately), 1 speaker jack, power adapter, and protective carrying case. Unit measures 11" x 8" x 4".

Radius Improving Math Problem Solving Strategy Kits
Strengthen higher-order thinking with interactive audio lessons that model 14 different skills and strategies for solving story problems. Includes 64-page Teacher's Guide with blackline masters, corresponding audio CD, and 29 double-sided 8 1/2" x 9 1/2" activity cards. Grades 3–6.

Radius Interactive Math Kits
Each set includes 24 8 1/2" x 11" double-sided activity cards, a corresponding audio CD, assorted manipulatives, and a 32-page blackline master Activity Book. Grades 1–2.

Radius for ELLs Math Concepts & Vocabulary Cards & CD Set
This specialized set focuses on building mathematics vocabulary for Spanish-speaking students in grades K–2. "Help" selections provide support in Spanish or English to promote learning for students in their native language. Includes 40 8 1/2" x 5" double-sided activity cards, a corresponding audio CD, and a Teacher's Note Card.