This product contains clock templates and differentiated worksheets to teach and reinforce how to calculate elapsed time. Students can use the clock templates to create their own clock to use as a manipulative to aid in calculating elapsed time. Worksheets include questions with number lines and clocks for students to use to calculate the elapsed time. There are also worksheets that require students to determine the End Time using the Start Time and Elapsed Time. There are also word problem worksheets that require students to calculate elapsed time as ell as worksheets that require students to determine the Start Time and End Time using the information provided (great for enrichment!) Answer keys included!