Math Lesson on Elapsed Time

Continuing with our Measurement Strand in Math. Here's what we have covered so far ....

• determine the relationships between the length and width of a rectangle and its area and perimeter, and generalize to develop the formulas [i.e., Area = length x width; Perimeter = (2 x length) + (2 x width)
• create, through investigation using a variety of tools and strategies, two-dimensional shapes with the same perimeter or the same area
• solve problems requiring the estimation and calculation of perimeters and areas of rectangles
• estimate and measure the perimeter and area of regular and irregular polygons, using a variety of tools (e.g., grid paper) and strategies.
• solve problems involving the relationship between a 12-hour clock and a 24-hour clock (e.g., 15:00 is 3 hours after 12 noon, so 15:00 is the same as 3:00 p.m.)
• estimate, measure (i.e., using an analogue clock), and represent time intervals to the nearest second
• estimate and determine elapsed time, with and without using a time line, given the duration of events expressed in minutes, hours, days, weeks, months, or years

     This week we focused on Elapsed Time and how to read a 12 hour and a 24 hour clock.

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