31. Discovering Geometry, 2nd Edition
    Seeking teacher resources for Discovering Geometry by Michael Serra
    - Date of thread's last activity: 10 January 2009

32. Definitions for geometry
    Finding definitions for geometry terms on the Web
    - Date of thread's last activity: 19 November 2003

33. Volume of a sphere
    Ideas for introducing students to determining the volume of a sphere.
    - Date of thread's last activity: 19 January 2012

34. Importance of toothpick puzzles
    What is the value for students using manipulatives to investigate geometric relations
    - Date of thread's last activity: 22 December 2006

35. Geoboard activities
    Using Geoboards to teach area of polygons
    - Date of thread's last activity: 5 November 2001

36. Tessellations
    Finding examples of tessellations in everyday life
    - Date of thread's last activity: 16 July 2008

37. Building math communications with Internet resources
    Using Internet resources and communication to enhance mathematics curricula.
    - Date of thread's last activity: 7 January 2007

38. Geometer's Sketchpad
    Finding information on the Web about Geometer's Sketchpad
    - Date of thread's last activity: 14 August 2002

39. Triangles
    Looking for background information about triangles
    - Date of thread's last activity: 27 October 2010

40. Difficulty learning math
    Ideas for solidifying teenager's multiplication facts
    - Date of thread's last activity: 17 June 2007

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