I think some (most?) of these mathlets are used in conjunction with MIT courses [0], for example it's used in [1] with an assignment so that it develops the int

I think some (most?) of these mathlets are used in conjunction with MIT courses [0], for example it's used in [1] with an assignment so that it develops the intuition of the student solving that assignment. [0] http://mathlets.org/courses/ http://mathlets.org/courses/ [1] http://ocw.mit.edu/courses/mathematics/18-01sc-single-variable-calculus-fall-2010/1.-differentiation/part-a-definition-and-basic-rules/session-1-introduction-to-derivatives/ http://ocw.mit.edu/courses/mathematics/18-01sc-single-variab...