Teacher Downloads

Dear Teachers
Here are a few files from my library on the use of simple everyday items & toys in the classroom. I have discovered over the years that nothing engages more than the use of ordinary items in an innovative way! Have fun and let me know if you find new exciting applications.
PS. I hope to post more of these and new videos soon.
Carl Ahlers
Science teacher

Physics

The Drinking Bird 
Heat is Energy in Motion
This vintage toy has that many useful classroom applications
Drinking Bird

Electricity
Make a simple homopolar motor and an electromagnetic bullet train
simplest_electric_motors

Chemistry

The Crystal Tree
Cohesion and adhesion forces in action as well as evaporation & condensation effects. This simple “toy” delivers amazing classroom opportunities.

Disappearing Ink 
A simple toy solution teaches acid/base and reversible reactions
DisappearingInk1