Grade 5 · 4 lessons and a review

Validate and Test Reusable Rules

Test inclusive thresholds, validate inputs and count results from a reusable rule.

Before you begin

Choose by skill rather than age alone. Read with an adult when useful, revisit a lesson, or explore another grade.

Lesson 1 of 4

Choose test cases below, at, and above a rule’s threshold.

Lesson 2 of 4

Reject values outside a stated whole-number input contract.

Lesson 3 of 4

Pass a threshold into a function without changing its comparison.

Lesson 4 of 4

Filter invalid inputs before counting those that meet a threshold.

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.

Guest answers are temporary. Keep your own paper or document; this unit does not certify completion or record a school grade.