#Normal curves

[mathbymaking-blog]

...of Invention

Well, it seems that the limitations of my design ability led to a more simple, elegant and versatile form of my Normal curve tools. The final draft form of the two curves, and the original prototype in transparency, are depicted below.

On question I would like to study is whether the more solid manipulative leads to a different learning experience than the transparency form.  That would be an interesting follow up to the study I have planned!