Cute idea... good way to get them to learn square roots without them knowing it because they know the numbers under the post its! It is very inexpensive and not at all time consuming to make. The only problem I can think of with this would be the postit notes loosing their ability to stick onto the clock's face.
The mathematical progressions of phi, square root of phi and square root of 2 as the basic harmonic building block ratios that make up geometry, color and music. Spirals such as phi, the square root of 2, 3 and 5 determine the relationships between the different Platonic Solids. It is an established, longstanding fact that if you take the difference between the base and height measurements of the Pyramid, the pi ratio of 3.14159 is expressed. – David Wilcox, Divine Cosmos
Pre-kindergarten to high school students looking for a better understanding of math will find over 4,800 problems to help them improve their skills. Problems can be printed in worksheet form and tips and tricks are included for each area of study.
The Universe of Discourse : A new proof that the square root of 2 is irrational
In this activity, the Environmental Protection Agency has determined that in a certain section of the country the average level of air pollution is 0.5 (Square root of P) + 10,000 parts per million (ppm), where P is the population. The 1980 census predicts that the population t years after 1980 will be 7000 + 40t2.