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Coding · Grade 3

Events and Interaction

Third graders build programs that interact with users: clicks, keys and typed answers. They use messages (broadcast and wait, when I receive) so characters can start each other's scripts, trace programs with several characters, and design interactions with clear instructions and helpful feedback.

  • 4 lessons
  • About 80 minutes
  • Events and interaction 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

  • Use clicks, keys and typed answers (ask and answer) as inputs to a program.
  • Use messages (broadcast and wait, when I receive) so one script starts another character's script.
  • Trace programs with several characters, events and messages to predict what happens and in what order.
  • Design an interaction that tells the user what to do and gives helpful feedback.

Lessons

  1. Many kinds of events 4 steps2 practiceabout 16 min
  2. Messages between scripts 5 steps3 practiceabout 16 min
  3. Trace the whole program 5 steps3 practiceabout 16 min
  4. Design good interactions 5 steps2 practiceabout 15 min
  5. Events and interaction 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