Count square units for area and add the sides for perimeter.
Area and Perimeter teaches third graders that area is the space inside a shape, counted in square units, and perimeter is the distance around it. Kids find both for rectangles and see how multiplication helps measure area.
Math course · Grade 3
Area and Perimeter · Learning goals
Area is the space inside a shape, counted in square units. Perimeter is the distance around it. Find both for rectangles.
Why it matters
Area shows a real use for multiplication: a 3 by 5 rectangle covers 15 squares.
Area and perimeter help with real tasks like fencing a garden, covering a floor or framing a picture.
Knowing the difference between inside and around builds the geometry kids need in grades 4 and 5.
Inside Area and Perimeter
A short read-aloud lesson first, then hands-on games and a quiz to lock it in.
Step 1 · Lesson
A short read-aloud lesson in 4 steps, with pictures and worked examples.
Step 2 · Game
Multiply length by width. (6 problems)
Step 3 · Game
Add all four sides. (6 problems)
Step 4 · Game
Read carefully: inside or around? (6 problems)
Step 5 · Game
Solve the room and garden problems. (5 problems)
Lesson preview
This is the real lesson text your child hears, read aloud by a friendly voice.
Area is how many squares cover a shape. This rectangle is 4 squares wide and 3 tall.
Count the squares, or multiply: 4 × 3 = 12 square units.
Perimeter is the distance all the way around. Add every side: 4 + 3 + 4 + 3 = 14.
A square has 4 equal sides. A 5 by 5 square has a perimeter of 20 and an area of 25.
For parents
Learning sticks best when kids use it in real life. Here are simple ideas from this course.
Use sticky notes or square tiles to cover a book cover. Count the squares for area, then measure around the edge for perimeter.
Practice
Real questions from Area and Perimeter. Try them with your child, then tap to see the answer.
Question 1
25
Question 2
63
Question 3
36
The full course has 23 questions with instant feedback, stars and rewards. Create a free account to play them all.
Area and Perimeter · Questions from parents
Area and Perimeter is a grade 3 math course for kids ages 8–9. That is Year 4 maths in the UK and Year 3 in Australia. It also works well for review in the next grade, or as a challenge for a confident younger learner.
Area is the space inside a shape, counted in square units. Perimeter is the distance around it. Find both for rectangles. Along the way they practice: Find the Area; Find the Perimeter; Area or Perimeter?; Area Stories.
About 10 minutes in total, split into 4 short levels. Most kids finish it over two or three sessions. Progress is saved, so they can stop any time and pick up where they left off.
Area and Perimeter is part of SkillBloom Premium, which unlocks every course in every subject. Each subject also has free courses, so your child can try SkillBloom before you decide.
No. Every lesson has a friendly read-aloud voice, questions are read aloud too, and the pictures help kids follow along. Confident readers can turn the voice off.
Yes. SkillBloom is built for homeschooling families. Kids work through lessons, games and quizzes on their own, and the parent dashboard shows what they finished and which skills need more practice. It works on phones, tablets and laptops.
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