
Amazon.com: Teaching Number: Advancing Children′s Skills and Strategies ( Math Recovery): 9781412921855: Wright, Robert J, Stanger, Garry, Stafford, Ann K, Martland, James: Books,

Experimentation in Mathematics: Computational Paths to Discovery,

Mathematics by Experiment, 2nd Edition: Plausible Reasoning in the 21st Century - Jonathan M. Borwein, David H. Bailey - Google Books,

Mathematical Proofs: A Transition to Advanced Mathematics (2nd Edition): Chartrand, Gary, Polimeni, Albert D., Zhang, Ping: 9780321390530: Amazon.com: ,

A History of Mathematics, Second Edition