Skip to content
PlayOwl

Coding · Grade 4

Variables and Expressions

Fourth graders evaluate expressions with the order of operations, trace assignments that use the current values of variables (including updating a variable from itself), turn word problems into expressions with clear variable names, and test programs that use input with several values.

  • 4 lessons
  • About 85 minutes
  • Expressions check: 8 questions
  • Ways to answer: fill in the blanks, choose an answer, put code in order, trace code, match pairs and type a number
Try it now (no account) One of the five free starter courses Open in PlayOwl

What learners will discover

  • Evaluate expressions with +, -, * and /, using brackets and the order of operations.
  • Trace assignments that use the current values of variables, including updates such as score = score + 10.
  • Turn a word problem into a program with clear variable names and the right expression.
  • Use input values in expressions and test the program with several inputs.

Lessons

  1. Expressions 4 steps2 practiceabout 16 min
  2. Variables in expressions 5 steps3 practiceabout 17 min
  3. Expressions for real problems 5 steps3 practiceabout 16 min
  4. Input and testing 5 steps3 practiceabout 16 min
  5. Expressions 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 4th grade coding

Guide for grown-ups