Time difference: Digital clocks with minutes
I can determine time differences between digital clocks to the nearest minute.
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General
In this lesson, students practice determining the time difference or elapsed time between digital clocks to the nearest minute. Students will be given the skills to find the time that has passed between two events. They will learn the “Mountain Method” to calculate elapsed time to the nearest minute. Then, students will complete several activities in which they practice calculating elapsed time.
Standards
CCSS.Math.Content.3.MD.A.1
Learning Objective
Students will be able to tell what the difference is between two digital clocks.
Introduction
Students will review the concept of elapsed time. They will be given a set start time. Students will then spin the wheel to determine the end time and take turns with their classmates to determine the time elapsed.
Instruction
The lesson will begin with students learning about how to utilize the “Mountain Method” to calculate elapsed time. Guide students in learning and understanding the 3 steps to use the mountain method when working with problems or situations to the nearest minute. Instruct students about what increment of time each symbol represents. Then, students will be instructed on how to utilize the method in a guided example, followed by another word problem they will solve on their own by dragging the mountains, hills, and rocks and adjusting each clock. Students will practice by completing several activities such as filling in the elapsed time for a flight schedule at their local airport.
Quiz
Students respond to ten questions in which they practice calculating elapsed time.
Closing
Students list 3 of their favorite activities they love and enjoy doing on Saturdays. They will then adjust the clocks to reflect both their start times and end times. Lastly, they will calculate the time elapsed for each.
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