Houston Independent School District. (1999). Algebra Online [Online]. Available: http://riceinfo.rice.edu/armadillo/Algebra/ [1999, June 10].

Samuel D. Glick. (1996). Algebra Online [Online]. Available: http://www.algebra-online.com/ [1999, June 10].

(1999). Algebra.help [Online]. Availiable: http://member.aol.com/algbrahlp/index.htm [1999, June 10].

National Science Foundation. (No date). The Math Forum. [Online] Available: http://forum.swarthmore.edu/ [1999, June 10].

(1994). The Math Forum Internet Mathematics Library. [Online]. Available: http://www.forum.swarthmore.edu/library/ [1999, June 10].

The CVC Math Domain. (No date). Junior and Senior High Lesson Plans. [Online]. Available: http://www.cvc.org/math/lessons.htm [1999, June 11].

(1999). Math Teaching Resources. [Online]. Available: http://antoine.fsu.umd.edu/phys/jbrode/teachres.html [1999, June 12].

Selby, Alan M. (1995). Appetizers and Lessons for Mathematics and Reason. [Online]. Available: http://www.cam.org/~aselby/lesson.htm [1999, June15].

Alexander Bogomolny. (1997). Interactive Mathematics Miscellany and Puzzles. [Online]. Available: http://www.cut-the-knot.com/ [1999, June 15].

Fanshel, Bill . (No date). Links for Teachers of High School Mathematics. [Online]. Available: http://httpsrv.ocs.drexel.edu/grad/sg92d033/mathlink.html. [1999, July13].

McAllister, Howard C. (1998). Sure Math. [Online]. Available: http://www2.hawaii.edu/suremath/intro_algebra.html [1999, July 13].

University of Akron. (1997). Algebra Review in Ten Lessons. [Online] Available: http://www.math.uakron.edu/~dpstory/mpt_home.html [1999, July 25].

Carver, Ruth. (1995). Teaching Ideas by Topics. [Online]. Available: http://forum.swarthmore.edu/sum95/ruth/ideas.html [1999, July 25].

Wagner, Sigrid. (No date). Research Issues in the Learning and teaching of Algebra. [Online]. Available: http://www.erlbaum.com/1071.htm [1999, July 25].

Mortensen, Carolynn S. (1998). Mathworld Interactive. [Online]. Available: http://forum.swarthmore.edu/mathworld/ [1999, July 25].