A View from the Back of the Envelope
http://www.vendian.org/envelope/

Mitchell N. Charity, Vendian Systems


This website is devoted to different methods of approximation. The site describes using orders of magnitude, scaling, simplifying numbers, exponential notation, and Fermi questions. Included with the descriptions are activities to practice approximation.

This resource is referenced here:
Subject: Mathematics
Resource Type: Activities, Pedagogic Resources:Overview/Summary
Special Interest: Quantitative
Quantitative Skills: EstimationKeyword: quantitative skills