- Texas Instruments Education Division - education.ti.com
- A+ Compass - www.apluscompass.com
- D&H Educational Distributors - www.dandh.com/buycalcs/default.htm
- JX2 Productions - www.jx2productions.com
- Calculus in Motion - www.calculusinmotion.com
- Massachusetts Department of Education - www.doe.mass.edu
- Key Curriculum Press - www.keycurriculum.com
- Association of Teachers of Mathematics in Western Massachusetts - www.mathwest.org
- The Math Forum - www.mathforum.org
- The Math Studio - www.mathstudio.com
- The National Council of Teachers of Mathematics - www.nctm.org
- PBS Teacher Resources - www.pbs.org/teachersource/
- Unofficial Download Site for TI Calculators - www.ticalc.org
