Math Design: the what and the why of it October
1 ,
2002
Why do we need to design mathematics?
Because currently, most onscreen mathematics is not designed, or at
least not very well, and it shows. Allow me to elaborate ...

Animating Algebra
November
5, 2002
Educational television can sometimes educate
its viewers in directions not originally intended or even foreseen.
For me, an educator interested in the design of onscreen mathematics,
the real learning began while reflecting on an animated segment of
some now otherwise forgotten educational program ...

Pythagorgrams November
18, 2002; Addendum November 26, 2002
Pythagorgrams is a simple tangramtype
learning widget to help students understand Pythagoras' theorem.
I began it as a design exercise, but I like the way it turned out
well enough to spread it around, so here it is. ...

Invert
and Multiply: the DIM Calculator January
9, 2003; Addendum February 3, 2002
The DIM 2003 Calculator is an interactive widget
to help students learn about dividing fractions. The intent is first
to help them understand why "invert and multiply"
works (through a "missing factor" approach), and then to
provide opportunity for practice/consolidation. A prerequisite for
using this widget is a clear understanding of fraction multiplication,
including how to cancel factors before multiplication.

Linear
Algebra Widgets – a Sampler January 15,
2004
A sample
of the linear algebra widgets I've been developing for a course in
elementary linear algebra, and some notes on their design.
