21. Factoring the sum and difference of two cubes
    How to factor the sum and difference of two cubes; how to teach it.
    - Date of thread's last activity: 10 September 2009

22. Post-Algebra 8th graders
    Creating a course for 8th graders after Algebra I but before Algebra II.
    - Date of thread's last activity: 13 April 2009

23. Explaining the relationship between the degree of a function and its shape
    Explaining the relationship between the degree of a function and its shape.
    - Date of thread's last activity: 19 April 2013

24. Cross multiplying
    Cross multiplying, isolating variables, and developing strategies for solving algebra problems.
    - Date of thread's last activity: 3 December 2007

25. Perpendicular Lines & Gradients
    An activity to help students discover the relationship between slopes of perpendicular lines.
    - Date of thread's last activity: 1 November 1998

26. Functions in middle school
    What is the role of functions in the middle grades math program?
    - Date of thread's last activity: 30 October 1998

27. Algebra - 8th grade
    Suggestions for helping students solve word problems with algebra.
    - Date of thread's last activity: 2 December 2007

28. Graph of a cubic equation
    Description of a cubic equation and graph.
    - Date of thread's last activity: 4 December 2007

29. "Bottoms up" as a method to factor trinomials
    A method for factoring trinomials and why it works.
    - Date of thread's last activity: 14 April 2013

30. New pre-algebra course without prerequisites
    Should Pre-Algebra become the new "gatekeeper" course? Should this course have prerequisites?
    - Date of thread's last activity: 21 May 2006

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