Data structures: fill in the blanks: fill-in-the-blank worksheet for Grade 9, page 1 preview

Fill-in-the-blank worksheet · Coding

Data structures: fill in the blanks · Grade 9

Read 8 sentences about data structures and write the missing word in each, using the word bank. Practices reading for meaning and topic vocabulary.

Grade 9 · ages 14 to 15
Easy
10 to 15 minutes
1 page
Free

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

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The word bank and sentences

Directions: Read each sentence. Choose the best word from the word bank and write it on the line.

Word bank: cross out each word as you use it
thousands · pointer · tree · stack · hash · graphs · queue leaf
1 Maps and social networks are naturally stored as ____.
2 In a tree, a node with no children is called a ____.
3 A linked list node stores data and a · to the next node.
4 A printer · handles jobs in the order they arrive.
5 A · table can find a value in about the same time no matter how big it gets.
6 Choosing the right data structure can make a program · of times faster.
7 Folders inside folders on a computer form a ____.
8 The undo button often uses a · of your recent changes.

What your child practices

Your child practices reading for meaning and topic vocabulary.

Grades and ages: Grade 9, ages 14 to 15
Time: About 10 to 15 minutes
Subject: Coding
Level: Easy for Grade 9
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

Try the first question together so the format is clear. Then let your child work through the rest, showing their thinking on the page. It is one of the easier sheets for Grade 9, good as a warm-up or a first look at the topic.

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

Tip for grown-ups: Read each sentence aloud with a hum for the blank, then try each word bank word in it.

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