Thinkabara

🧮 3rd Grade · Math3.MD.C.7dUnit 4: Area

Area of combined rectangles

Google Classroom

🎯 Objective: Students find the area of figures made of rectangles by adding.

Lesson outline

  1. Show an L-shaped room on grid paper.
  2. Split it into two rectangles, find each area and add; compare different splits.
  3. Solve floor-plan problems in pairs.
  4. Exit: area of one L-shaped figure with labeled sides.

Lesson 5 of 5 in this unit. In the Lesson Planner this lesson takes 1–3 class periods depending on your timetable: day 1 introduce & model, then practice, small-group reteach and a quick check.

📐 Standard

3.MD.C.7d

Common Core State Standards for Mathematics, Grade 3 — typical US scope & sequence

🏁 Unit goals

  • Measure area by counting unit squares
  • Relate area to multiplication and addition

✅ Check for understanding

End with the exit ticket in the outline. Sort answers into got it / almost / not yet and start the next lesson with a 5-minute reteach for the “not yets”.

Practice & resources on Thinkabara

🎯 Practice: Area & perimeter📚 All 3rd Grade skills🎮 Learning games⚡ Capy Live class quiz

🗓️ Plan the whole year like this

Add 3rd Grade Math to your free Lesson Planner: enter your timetable once and every period shows the next lesson, skipping weekends and school breaks.

Add to my planner See the year’s sequence

More lessons in “Area”

  1. What is area?
  2. Square units
  3. Area by multiplying
  4. Area and the distributive property
  5. Area of combined rectangles

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