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Coding · Grade 3

If-Then Decisions

Third graders read comparisons (equal to, more than, less than), trace if-then and if-then-else blocks inside loops, use decisions to win, lose and react in games, and choose conditions that match rules exactly, testing the boundary value.

  • 4 lessons
  • About 80 minutes
  • Decisions check: 8 questions
  • Ways to answer: choose an answer, put code in order, trace code, match pairs, type a number and sort into groups
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What learners will discover

  • Read and evaluate comparisons that use equal to, more than and less than.
  • Trace if-then and if-then-else blocks inside loops, where the answer can change each time round.
  • Use decisions in games to win, lose and react to events.
  • Choose the condition that matches a rule exactly, and test the boundary value.

Lessons

  1. Comparisons 4 steps2 practiceabout 15 min
  2. Decisions inside loops 5 steps3 practiceabout 16 min
  3. Decisions in games 5 steps3 practiceabout 16 min
  4. Choosing the right condition 5 steps3 practiceabout 16 min
  5. Decisions check 8 questions at the end

Keep exploring

Games to practice with

  • Robot RoutesSnap together arrow, repeat and dance blocks to guide Bolt the robot home.
  • Bug DetectiveA robot program almost works. Run it, spot the buggy block, and fix it.
  • Sorting FactoryTurn a work order into if/else rules and watch the conveyor sort every item.

More 3rd grade coding

Guide for grown-ups