Equations and inequalities
- http://learnzillion.com/lessons/1503-solve-algebraic-equations-involving-addition-and-subtraction-using-inverse-operations
- http://learnzillion.com/lessons/168-solve-multiplication-and-division-problems-using-1step-equations
- http://www.youtube.com/watch?v=DO-hzLh79uw&feature=relatedY
- http://www.learnalberta.ca/content/mesg/html/math6web/index.html?page=lessons&lesson=m6lessonshell11.swf
- http://crctlessons.com/one-step-equations-with-addition.html
- http://crctlessons.com/solving-one-step-equations.html
- http://www.mathchimp.com/6.3.1.php
- http://www.shodor.org/interactivate/activities/AlgebraFour/
- http://www.sheppardsoftware.com/mathgames/integers/FS_CompareIntegers.htm
- http://hotmath.com/hotmath_help/games/ctf/ctf_hotmath.swf