81. Geometry investigation wanted
    Geometry investigations or projects at the 5th grade level
    - Date of thread's last activity: 31 May 2000

82. Volume and Surface Area of Cones
    Why the volume of a cone is 1/3 the volume of a base surface area time height
    - Date of thread's last activity: 31 March 2006

83. Trapezoid
    Definition of trapezoid
    - Date of thread's last activity: 28 June 2000

84. Geometry in GED math
    Practical applications of the slope of a line
    - Date of thread's last activity: 7 December 2006

85. Paper folding
    Christmas ornament paper folding activity
    - Date of thread's last activity: 7 December 1998

86. Geometry Textbook "Discovering Geometry" by Michael Serra
    Opinions about using Geometry Textbook "Discovering Geometry" by Michael Serra along with The Geometer's Sketchpad software and "patty paper" geometry techniques
    - Date of thread's last activity: 7 August 2010

87. Symmetry
    Using pattern blocks to teach symmetry operations at a level that is appropriate for secondary level
    - Date of thread's last activity: 13 September 1999

88. What high school geometry text do you use?
    High School geometry text book
    - Date of thread's last activity: 3 August 2006

89. Teacher Knowledge
    Opinion about the effect of teacher knowledge on teaching and learning
    - Date of thread's last activity: 29 September 2001

90. Pythagorean Theorem
    One way to teach the Pythagorean Theorem
    - Date of thread's last activity: 2 March 2013

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