CK-12 Foundation
Ck 12: Elem Math: Solving for Ending Time in 5 Minute Intervals Word Problems
[Free Registration/Login may be required to access all resource tools.] Students watch a video and attempt practice problems on solving time word problems involving 5 minute intervals.
University of St. Andrews (UK)
University of St. Andrews: Special Relativity
A historical approach to special relativity, giving all the events and names in the history of discovery of special relativity. Many links to these individuals.
Math Slice
Math Slice: Elapsed Time: Math Worksheets
Select a time interval, from one minute to one hour, and this tool creates a learning exercise for you. Learners must calculate the time interval between two clocks. You can then click on the 'New Worksheet' button at the top to create a...