We began offering course modules in 1997. At that time, we had only three course modules to offer: They were earlier versions of the following current MTL modules:

Module 1 -Calculus&Mathematica for Mathematics Teachers.

Module 2 -Using Internet Resources for High School Mathematics Teaching.

Module 3 -Using Mathematica in the Mathematics Classroom.

I had developed the initial versions of these three modules to provide professional development for teachers in rural Illinois high schools where the Calculus&Mathematica course was being offered for U of I credit through a local area network based on 800-number line connection between the participating high schools and the Calculus&Mathematica lab at the U of I.

We currently offer 17 different course modules for U of I graduate credit or (since about 1999) for Continuing Education Units - non credit).