Lesson plan

# 3. Tell time to the hour using both hands on the clock (C)

teaches Common Core State Standards CCSS.Math.Content.1.MD.B.3 http://corestandards.org/Math/Content/1/MD/B/3
teaches Common Core State Standards CCSS.Math.Practice.MP6 http://corestandards.org/Math/Practice/MP6
teaches Common Core State Standards CCSS.Math.Practice.MP7 http://corestandards.org/Math/Practice/MP7

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Lesson objective: Understand that a new hour begins when the minute hand points to the 12 on an analog clock.

Students bring prior knowledge of telling time to the hour from working with analog clocks with the hour hand only. This prior knowledge is extended to include the minute hand as students look at clocks set to the hour. A conceptual challenge students may encounter is confusing the two hands on the clock and misinterpreting their meaning.

The concept is developed through work with analog clocks with two hands and digital clocks, which demonstrate how time can be represented to the hour.

This work helps students deepen their understanding of equivalence because students see multiple ways to represent the same time on different clocks.

Students engage in Mathematical Practice 7 as they look for and make use of structure through looking at analog clocks with both hands and digital clocks all set to the hour.

Key vocabulary:

• Analog clock
• Digital clock
• Hour hand
• Minute hand
• Colon
• Hour

Special materials needed:

• Small, manipulative clocks with both hands for students to explore how the hands move