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  Title Copies
CBL2 and adapter 
CBL2 ELECTRONICS 
CBR 
CBR2 Sonic Motion Detector 
Center Stage Math 
ISBN: 074064811X 
ISBN 13: 9780740648113 
Centimeter Grid XY Axis (Dry Erase) 
Year: 2024 
Challenge of the Unknown: Teaching Guide 
Year: 1986 
ISBN: 0393955362 
ISBN 13: 9780393955361 
Challenge, a program for the mathematically talented, grades 3-6 
ISBN: 201201704 
Change and Motion: Calculus Made Clear Part 1 &2 
ISBN: 1598032313 
Children learning mathematics : a cognitive approach to teaching 
ISBN: 131324810