Block code: what is in each box? (practice): coding worksheet for Grade 3, page 1 preview

Coding worksheet · Coding

Block code: what is in each box? (practice) · Grade 3

Read 6 short block code programs about variables that change step by step and work out by hand what each one prints or the final value of a variable. Builds careful code tracing.

Grade 3 · ages 8 to 9
Medium
15 to 20 minutes
1 page
Free

The answer key is a separate page for grown-ups. Sign in to download it.

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The programs to trace

Directions: Read each program from top to bottom, one block at a time. Keep track of every box (variable) as it changes, then write the answer.

1 What does Olly say?
set shells to 0 set pebbles to 16 repeat 3 times change shells by 3 change pebbles by -2 say shells, pebbles
2 What does Olly say?
set coins to 3 set seeds to coins change coins by 5 say seeds
3 What does Olly say?
set apples to 2 set gems to 6 set apples to apples + gems change gems by 4 say apples + gems
4 How many coins at the end?
set coins to 5 repeat 2 times change coins by 4
coins =
5 What does Olly say?
set red to 8 set blue to 11 set red to blue set blue to red say red, blue
6 How many kites at the end?
set kites to 2 repeat 2 times set kites to kites * 2
kites =

What your child practices

Your child builds careful code tracing. The skill is “Variables”: use named values such as a score, lives or a timer that a program changes and checks.

Grades and ages: Grade 3, ages 8 to 9
Time: About 15 to 20 minutes
Subject: Coding
Level: Medium for Grade 3
Answer key: Yes, for grown-ups who sign in
Printing: 1 page, US Letter or A4, low-ink option
Updated: October 15, 2026

How to use it

Work through the first program together, one line or arrow at a time. Then let your child work through the rest, showing their thinking on the page. It is pitched at the expected level for Grade 3, for practice after the skill has been taught.

An answer key comes with it as a separate page that grown-ups download after signing in.

Tip for grown-ups: Have your child write each variable's value beside its line as they trace.

Done on paper? A grown-up can record it on the child's page in PlayOwl; downloading alone doesn't count as finished.