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Math lesson plan · 1st grade (Year 2 in England) · 60 minutes

Measure with same-size units and compare unit sizes

Measurement

CCSS 1.MD.A.2CCSS 2.MD.A.2England: Y1 Measurement

Objective and success criteria

Students will: Measure with same-size units and compare unit sizes.

  • I can answer questions on today's skill on my own, without help.
  • I can explain each step and say why it works.
  • I can check my answer and spot a mistake.

Before and after

Needs first: Measure length with units

Leads to: Spot measuring mistakes: gaps and overlaps

Materials: Rulers, scales and measuring jugs, Clock faces, Conversion chart, Mini whiteboards and pens, Printed student sheet (below).

Warm-up · 6 min

  • Quick retrieval from earlier learning (Measure length with units). Students answer on mini whiteboards.
  • Show answers together and note who needs support in the main task.
  1. Maya's paper chain is 9 clips long. Yuki's is 5 clips long. How many clips longer is Maya's chain? → 4Prompt: Find the difference between the two lengths.
  2. Kai's paper chain is 5 clips long. Mei's is 3 clips long. How many clips longer is Kai's chain? → 2Prompt: Find the difference between the two lengths.
  3. Kai's paper chain is 10 clips long. Ravi's is 5 clips long. How many clips longer is Kai's chain? → 5Prompt: Find the difference between the two lengths.

Hook · 6 min

  • Ask the class to estimate the length of the room or the weight of a bag before measuring it.
  • Share the objective: Measure with same-size units and compare unit sizes. Read the success criteria together.

I do: model it · 12 min

  • Work through the example out loud, saying why you do each step, not just what you do.
  • Example: A grown-up measures a table and gets 7 hand-spans. Sam's hand is bigger. Will Sam count more or fewer hand-spans?
  • Step 1: Bigger hand-spans, so fewer of them.
  • Step 2: Fewer
  • Answer: Fewer
  • Pause after each step and ask a student to say what comes next.

We do: guided practice · 12 min

  • Do these together. Students try each step on whiteboards before you reveal it.
  • Use the hints as prompts rather than giving the answer.
  1. A grown-up measures a table and gets 11 hand-spans. Luis's hand is bigger. Will Luis count more or fewer hand-spans? (More / Fewer / The same) → FewerPrompt: The table does not change.
  2. Sofia measured a book with paper clips and got 5. Diego measured the same book with cubes and got 10. Which unit is longer? (The paper clip / The cube) → The paper clipPrompt: The book is the same length both times.

You do: independent practice · 17 min

  • Students work on the student sheet. Circulate and check the first two answers of every student early.
  • Students who finish: write a question of their own for a partner, with the answer.

The 8 questions are on the student sheet below, with answers in the key.

Exit ticket · 7 min

  • Two questions on their own. Sort answers into got it / nearly / not yet to plan the next lesson.
  1. Ravi measured a book with paper clips and got 4. Leo measured the same book with cubes and got 7. Which unit is longer? (The paper clip / The cube) → The paper clipPrompt: The book is the same length both times.
  2. A grown-up measures a table and gets 12 hand-spans. Lucia's hand is bigger. Will Lucia count more or fewer hand-spans? (More / Fewer / The same) → FewerPrompt: The table does not change.

Watch out for

  • Measuring from the end of the ruler instead of zero.
  • Converting units the wrong way (multiplying instead of dividing).

Support and stretch

Support

  • Review first: Measure length with units.
  • Use concrete materials: rulers, scales and measuring jugs.
  • Give the first step of each question, or a partly worked example to finish.
  • Pair with a confident partner for the guided practice.

Stretch

  • Move on to: Spot measuring mistakes: gaps and overlaps.
  • Explain a common mistake in writing and how to fix it.
  • Write a word problem that uses today's skill, then solve a partner's.

Homework and more practice

Free online practice with hints and printable worksheets for this skill: eurekami.com/math/grade-1.

Free lesson plan from eurekami.com/lesson-plan-builder

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Measure with same-size units and compare unit sizes

Name

Date

Score/ 8

  1. Question 1

    A grown-up measures a table and gets 6 hand-spans. Leo's hand is bigger. Will Leo count more or fewer hand-spans?

    • A. More
    • B. Fewer
    • C. The same

  2. Question 2

    The spoon lies along a row of cubes, starting at 0. How many cubes long is it?

    12345678910111314012

    Answer

  3. Question 3

    Yuki measured a book with paper clips and got 6. Hana measured the same book with cubes and got 9. Which unit is longer?

    • A. The paper clip
    • B. The cube

  4. Question 4

    A grown-up measures a table and gets 9 hand-spans. Kai's hand is smaller. Will Kai count more or fewer hand-spans?

    • A. More
    • B. Fewer
    • C. The same

  5. Question 5

    The pencil lies along a row of cubes, starting at 0. How many cubes long is it?

    12345678910121314011

    Answer

  6. Question 6

    Amara measured a book with paper clips and got 6. Leo measured the same book with cubes and got 11. Which unit is longer?

    • A. The paper clip
    • B. The cube

  7. Question 7

    A grown-up measures a table and gets 12 hand-spans. Zara's hand is smaller. Will Zara count more or fewer hand-spans?

    • A. More
    • B. Fewer
    • C. The same

  8. Question 8

    Mei measured a book with paper clips and got 4. Kwame measured the same book with cubes and got 6. Which unit is longer?

    • A. The paper clip
    • B. The cube

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Answer key: Measure with same-size units and compare unit sizes

  1. 1. B. Fewer

  2. 2. 12

  3. 3. A. The paper clip

  4. 4. A. More

  5. 5. 11

  6. 6. A. The paper clip

  7. 7. A. More

  8. 8. A. The paper clip