This link are the resources from Hippasus' website by Dr. Ruben R. Puentedura who designed the SAMR model for the effective use of technology for learning. His work is designed to help transform education by combining a broad range of information technologies with novel educational approaches and a set of rigorous metrics for the evaluation of results.
Hippasus of Metapontum was a Greek Pythagorean philosopher who discovered that the square root of two cannot be expressed as the ratio of two integers (i.e., as a rational number). This discovery effectively transformed mathematical thought - it required the creation of a whole new class of numbers (the irrational numbers) in addition to the previously known integers and rational numbers.
