Lesson Plan:

Geometry Real Word Problems

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February 7, 2017
by Byron Delcomb
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Subject
Standards
February 7, 2017
by Byron Delcomb

Learning Objectives

Students will be able to use the length-times-width strategy to solve rectangular area problems in real-world contexts.

Lesson

Introduction (5 minutes)

  • Hold up a flat hand to the class and place a rectangular piece of paper over it that nearly covers its area.
  • Explain how the rectangle’s area, the amount of space it takes up is approximate, or almost, the area of your hand.
  • Ask the class, “What do you know about area?” and take student responses.

Explicit Instruction/Teacher Modeling (10 minutes)

  • Define area as the space inside a shape. Explain examples in life include: Carpeting a room, sodding a lawn, or building a deck.
  • Show how to measure the paper rectangle with a ruler using the A = l x w formula, explaining that you are really determining how many square units are in the area. Explain that the answer will be in square units and how to write that (for example: 3cm2).
  • Supply paper, rulers, and scissors to your students. Have them cut out a rectangle with approximately the same area of their hand.
  • Students will measure their rectangle area and share their calculations with a partner.

Guided Practice/Interactive Modeling (10 minutes)

  • Distribute the Areas Around A Room worksheet and go over the instructions with your students.
  • Complete the first exercise as a class, taking student responses and answering any clarifying questions.

Independent Working Time (15 minutes)

  • Instruct students to complete the remaining exercises with a partner or in small groups.

Extend

Differentiation

Support

  • Students can work in teams where some members measure and others record measurements.
  • Students may shadow members of another group, with the option to return to their original team.
  • Provide pre-drawn rectangles using whole number sides that students may measure.

Enrichment

  • Students may replace the Areas Around A Room exercise options with other items to measure.
  • Measurements may be taken in smaller increments, like centimeters or 1/8 of an inch.

Technology Integration

  • You will need a computer with internet access to project a video example of measurement.
  • Use a projector to display the video to the class.

Review

Assessment (5 minutes)

  • Ask students to use their work as an example to explain the area of their paper rectangles.
  • Have students explain any problem from the Areas Around A Room worksheet.

Review and Closing (5 minutes)

  • Students can share out clues, problems or wondering reflections, or leading with sentence frames. For example, “I could tell…" "I had a challenge with…" or "I wonder if…”

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