National Council of Teachers of Mathematics
The Math Forum: Calculating Sales Tax
Dr. Math is asked about calculating sales tax. A quick and easy to follow explanation of how it works using fractions, decimals, ratio, and percent.
PBS
Pbs: Real Life Math: Physical Trainer
The general manager of a fitness center explains how numerical calculations, percentages, and ratios are critical to his job in this video from KAET. In the accompanying classroom activity, students explore percentages, fractions, and...
Illustrative Mathematics
Illustrative Mathematics: 6.g Painting a Barn
This task asks students to determine the area of the exterior walls of a barn and to calculate how many gallons of paint would be needed to cover them, as well as the cost of the paint. Aligns with 6.G.A and 6.RP.A.3.
Other
Ask Numbers: Measurement Conversion Calculators and Charts
What kind of unit conversion would you like to do? This site will allow you to do a multitude of conversions. Just click on the specific measurement you are needing to convert. It also provides a history of measurements and a chart of...
Education Place
Houghton Mifflin: Eduplace: Extra Practice Quiz Distance, Speed, & Time
Using these rate of speed problems practice figuring out either the distance, time or speed. Read the interactive quiz rules and then click on the "Begin" ticket. If you answer incorrectly you get one more chance to try again then you...