Choose tests that catch a rule error
Use ordinary and boundary inputs to check a small function.
Open lesson 1Build Evidence for Small Functions
Test a function’s contract, boundaries and list structure, then retain regression cases.
Before you begin
- Read inequalities; use zero-based list positions; trace if/else and accumulators.
Choose by skill rather than age alone. Read with an adult when useful, revisit a lesson, or explore another grade.
Follow the lesson sequence
Test Valid and Invalid Inputs Separately
Turn a function contract into representative tests and boundary tests.
Open lesson 2Use a Small Test to Find a Loop Error
Expose a skipped last element with empty, one-item and ordinary lists.
Open lesson 3Repair a Function and Keep Its Test
Verify a correction against ordinary, boundary and previously failing cases.
Open lesson 4Review and transfer
After the lessons, try 4 new review cases and a practical task. Each answer has an explanation and a link back to the related lesson.
Open the unit reviewGuest answers are temporary. Keep your own paper or document; this unit does not certify completion or record a school grade.