51. Polyhedra
    Understanding and constructing Polyhedra
    - Date of thread's last activity: 21 September 2006

52. Conic Sections: Circles
    How to teach different aspects of conic sections in an enjoyable manner
    - Date of thread's last activity: 10 July 2006

53. Orthocenter, Circumcenter, Incenter
    Understanding Orthocenter, CircumCenter, Incenter, and Euler's Line using Geometer's Sketchpad
    - Date of thread's last activity: 20 December 2006

54. How Pi fits into the K-12 curriculum
    How Pi fits in the K-12 curriculum
    - Date of thread's last activity: 15 September 2012

55. Sequence for Alg II and Geometry
    Sequence of teaching Algebra I, Geometry, and Algebra II
    - Date of thread's last activity: 3 September 2006

56. Geometry
    Finding definitions for mathematical terms
    - Date of thread's last activity: 24 September 2009

57. Fractals
    Finding Web resources about fractals which high school students can understand
    - Date of thread's last activity: 3 December 2007

58. Math in a Holocaust Unit
    Connecting math to an interdisciplinary unit about the Holocaust
    - Date of thread's last activity: 31 July 2001

59. Geometry for gifted 8th graders
    Suggestions for independent study involving gifted 8th graders
    - Date of thread's last activity: 4 December 2007

60. Software and geometry
    Software for manipulating three dimensional shapes
    - Date of thread's last activity: 17 August 1999

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