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September 2001, Volume 8, Issue 1

FEATURES

Developing Mathematical Thinking Using Codes and Ciphers
Lisa Evered, Serigne Gningue
The radio premium codes of Little Orphan Annie, Dick Tracy, and Captain Midnight are used to introduce basic principles of coding and decoding, including the use of letter frequencies to decode secret messages.

Teaching Addition and Substraction Facts: A Chinese Perspective
Wei Sun, Joanne Zhang
How teachers can best help children master the basic addition and subtraction facts is an issue in every country. This article discusses how this is handled in China and highlights the impact that language has on how children think about numbers.

Are Rules Interfering with Children's Mathematical Understanding?
Jean Behrend
The consequences of teaching rules without understanding are demonstrated with examples from two third-grade children. Suggestions are given for alternative instructional strategies.