When did these courses first become available?
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 11 different course modules for U of I graduate credit.