Skip to the content
Peabody TeachFor teachers and grown-ups

What is one-third?: 3rd grade math

Unit fraction 1/b: one part when a whole is split into b equal parts; a/b is a copies of 1/b. A free 3rd grade lesson plan, a question set with answers and a printable sheet with its key. Copy it and make it yours.

Lesson plan

Goal

  • Students can do this: unit fraction 1/b: one part when a whole is split into b equal parts; a/b is a copies of 1/b.

Teach (10 min)

  • The bottom number says how many equal pieces. The top says how many you have.
  • 3/4 means 3 of 4 equal pieces.
  • Work one example on the board while students say each step aloud, then do one together.

Practise (15 min)

  • Students work the printable sheet in pairs, then alone.
  • Or practise it as a game with no sign-up: https://peabody.kids/math/fractions.name?lesson=3-fractions-name&at=3

Exit ticket (5 min)

  • Use the first three questions on the printable sheet as a slip.

Printable sheet

Name: ____________________   Date: ____________

What is one-third? (3rd grade)

  1. What fraction of the bar is shaded?
  2. What fraction of the bar is shaded?
  3. What fraction of the bar is shaded?
  4. What fraction of the bar is shaded?
  5. What fraction of the bar is shaded?
  6. What fraction of the bar is shaded?
  7. What fraction of the bar is shaded?
  8. What fraction of the bar is shaded?
  9. What fraction of the bar is shaded?
  10. What fraction of the bar is shaded?
  11. What fraction of the bar is shaded?
  12. What fraction of the bar is shaded?
Key
  1. 34
  2. 26
  3. 45
  4. 14
  5. 46
  6. 24
  7. 13
  8. 13
  9. 24
  10. 13
  11. 23
  12. 14

Written by Peabody from its own skill pages. Free, no ads, no sign-in. Children can practise this on Peabody. More from teachers: teacher-shared resources.