Videos
The Metric System
A Rational, Simple and "Easy to Use" Measurement System Framework for Teaching Science and Mathematics.
History of the Metric System vs. United States Customary Systemwith ONE system of measurement.
This lesson was a missed opportunity to introduce negative numbers, the key to an early start in algebra. But don't blame the teacher. She is limited by the US K-6 mathematics curriculum.
Metric System Conversion
Common Core
Common Core Addition
Common Core Subtraction