Grade 4: Computing
Start with a unit whose prerequisites fit. Work through the lessons, use the study guide to review, and try the new cases before continuing.
- Unit 1 · 4 lessons
Encode Pictures and Written Messages
Represent a 2×3 picture with paletteA=dark,B=light and row sequencesABA/BAB. Count pixels and estimate its data at 2 bytes per pixel; state the model’s limit.
Before you begin: Multiply whole numbers and follow a key.
- Unit 2 · 4 lessons
Trace and Repair Changing Values
Track counters, assignment order and accumulated totals, then repair misplaced resets.
Before you begin: Add small whole numbers; read a list in order; follow a repeat instruction.
- Unit 3 · 4 lessons
Protect a Shared Workspace
A pretend viewer needs a read-only report and receives an unexpected password request. State the correct permission, verification route and why two passwords are not different factor categories.
Before you begin: Read a supplied role table and distinguish view from edit.
- Unit 4 · 4 lessons
Control a Paper Interactive Display
Design a paper flower animation with frames 1,2,3 and a sound toggle initiallyOff. Trace two toggles, describe the frame sequence and create a labeled status.
Before you begin: Read ordered pairs and add small whole numbers.
Check what you can explain
The subject test uses additional supplied cases across these units. Its feedback links back to the relevant lessons. Use it to plan practice; a score on these questions is not a school grade or proof of complete subject mastery.
Open the subject test