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Steve Rosenberg (BU), Mike Spillane and Daniel Wulf (Watertown HS), Heron Triangles and Moduli Spaces [pdf]. Mathematics Teacher, Vol. 101, No. 9, May 2008, pp. 656-663.

Allen Olsen (Lawrence HS), Divisibility Tests [pdf]. Mathematics Teacher, Vol. 100, No. 1, August 2006, pp. 46-52.

Ben Sinwell (Chelsea HS), Chebyshev Polynomials [pdf]. Mathematics Teacher, Vol. 98, No. 1, August 2004, pp. 20-25.

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Glenn Stevens (BU), PROMYS for Teachers: Learning in the Spirit of Exploration [pdf].MER Forum, Vol. 13, No. 3, Summer 2001, pp. 7-10.