1. Safe-T Compass
   How to use a Safe-T Compass in geometry class.
   - Date of thread's last activity: 7 March 2009

2. Euler's formula
   Using Euler's formula to determine specifications for building a dome.
   - Date of thread's last activity: 11 December 2007

3. Geometric constructions
   Creating basic geometry constructions with safety compasses or simple classroom supplies.
   - Date of thread's last activity: 19 December 2007

4. Geometry attributes
   Explanation of bases and faces of 3-dimensional figures.
   - Date of thread's last activity: 22 January 2008

5. Rotating shapes on a coordinate grid
   Helping students understand rotations of figures on a coordinate grid.
   - Date of thread's last activity: 10 January 2008

6. Teaching area of parallograms
   Suggestions for helping students understand why the perpendicular height of a parallelogram, not its side length, is used to calculate area.
   - Date of thread's last activity: 14 February 2008

7. Congruent angles
   Developing the concept of congruent angles with elementary students.
   - Date of thread's last activity: 4 March 2008

8. Scale factor
   How to teach scale factor to 7th graders.
   - Date of thread's last activity: 17 March 2008

9. Approximations of pi
   Deciding which approximation of pi to use in various situations.
   - Date of thread's last activity: 16 March 2008

10. Cylinders
    Helping students design a cylinder with the optimal volume and minimal surface area.
    - Date of thread's last activity: 29 February 2008

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