John Colgren gave a science presentation to an education class that included demonstrations of air pressure like an amazing coat that changed colors and a Cartesian diver. He also showed experiments with a rope in a bottle, magic bottle, banging a drum, smoke rings, and breaking a board with air pressure. Mr. Colgren devoted his life to promoting science education through his own experiments and curriculum he developed over his 33-year teaching career.

1. The Amazing Mr. C
John Colgren’s Science Presentation
for EDU 318
March 1, 2012

2. Introduction to Class

3. Air Pressure Experiment

4. Amazing Coat

5. Cartesian Diver

6. Rope in a Bottle

7. Magic Bottle

8. Banging the drum

9. Puffs of air and smoke rings

10. Breaking a board showing air pressure
on the newspaper.

11. Theories of Gravity

12. Thanks!
 Mr. John Colgren devoted his life to science and
promoting its study. He will present his marvelous
 experiments and offer some very special guidance to all
prospective teachers.
 Mr. Colgren taught science for 33 years, creating his
own curriculum with some exceptional units;
 such as building homemade rockets from household
materials, operation egg drop and other related
 demonstrations promoting and teaching the scientific
method. In addition, he produced nearly three
 hundred educational videos for Discovery Education.
 For more information contact:
 dlfulton@ben.edu