March 21, 2016
by Nekeisha Hall
Lesson Plan:

The Smaller They Come

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Students will be able to use standard measures of length and measure using a ruler.

(10 minutes)
(15 minutes)
  • Give your students rulers, and ask them to see what units of length they see.
  • Review how to measure an object with a ruler by starting at the 0 mark and measuring straight across.
  • Acknowledge that some objects aren't exact, so decimals or fractions are necessary to record an exact measurement.
  • Demonstrate on the whiteboard how to measure 3.4 centimeters. Draw several lines for practice.
(15 minutes)
  • Demonstrate to students that 3.4 centimeters can also be written as 34 millimeters.
  • Instruct your students to measure lines of different sizes and write them the two ways that they just learned.
(15 minutes)
  • Give your students the Length in Centimeters worksheet to complete.
  • Enrichment: Have your students complete the Measuring Length in Centimeters worksheet.
  • Support: Before working on decimals, have your students master the concept of measuring to a whole number. Throughout this activity, have them round up or down to the nearest whole number instead of using decimals or fractions.
(5 minutes)
  • Circulate and provide support where needed.
  • Make sure that your students are using their rulers from the correct side.
(5 minutes)
  • Ask your students to practice estimating the length of pencils in the classrooms.
  • Test the guesses by pulling out your ruler and checking!

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