Unit 5, Lesson 12
Horas, minutos y segundos
Grado 4
Preparation
Lesson Purpose
The purpose of this lesson is for students to use multiplication to describe the relationship between units of time and to express larger units of time in terms of smaller ones.
Lesson Narrative
In grade 2, students learned to tell time to the nearest five minutes and recognized that there are 60 minutes in 1 hour. In grade 3, they learned to tell time to the nearest minute and to measure intervals of time. Students may also know that there are 60 seconds in a minute. In this lesson, students see the relationship between hours and minutes, and between minutes and seconds, in multiplicative terms. They then use their new insights to convert hours into minutes, and minutes into seconds.
- Engagement
- MLR8
- Describe (orally) the multiplicative relationships between units of time.
- Determine a measurement in minutes that is equivalent to a measurement in hours.
- Determine a measurement in seconds that is equivalent to a measurement in minutes.
Required Preparation
None
Teacher Reflection Questions
How did previewing the Cool-down ahead of time help you synthesize the learning that took place in the lesson?
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