University of Cambridge
University of Cambridge: Nrich: A Rod and a Pole
At this one page website work on this challenge using your very best problem solving skills to find a reasonable answer. Actually, there are a number of solutions. When you find yours check the website to see the solutions already listed.
National Council of Teachers of Mathematics
Nctm: Figure This: Tan, Don't Burn
How about a math challenge for a sunny day at the beach? Apply your problem solving, number sense, and logical reasoning skills to find out how long it would take Helix to get sunburned using SPF 10 lotion. Discover why understanding...
CK-12 Foundation
Ck 12: Elem Math: Using Timelines to 1 Minute Increments
[Free Registration/Login may be required to access all resource tools.] In this interactive media source, the video defines a timeline and shows an example of how to read a timeline to answer questions, followed by practice problems to...