Trace the strings: indexing and slicing (warm-up): coding worksheet for Grade 11, page 1 preview

Coding worksheet · Computers & Digital Literacy

Trace the strings: indexing and slicing (warm-up) · Grade 11

Read 6 short Python programs about string indexing, slicing and loops over letters and work out by hand what each one prints or the final value of a variable. Builds careful code tracing.

Grade 11 · ages 16 to 17
Easy
20 to 30 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: Trace each program line by line without a computer. Keep a note of every variable as it changes, then write exactly what the program prints or the final value.

1 What is printed? Write each line.
1 for i in range(4, 0, -1):
2 What is printed?
1 text = "turtle"
2 result = ""
3 for ch in text:
4 result = ch + result
5 print(result)
3 What is printed?
2 count = 0
3 for ch in word:
4 if ch == "o":
5 count += 1
6 print(count)
4 What is printed?
1 def frame(word, edge):
2 return edge + word + edge
3 print(frame("window", "#"))
5 What is printed?
2 print(word[1:5])
6 What is printed? Write each line.
1 for i in range(1, 4):

What your child practices

Your child builds careful code tracing.

Grades and ages: Grade 11, ages 16 to 17
Time: About 20 to 30 minutes
Subject: Computers & Digital Literacy
Level: Easy for Grade 11
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 one of the easier sheets for Grade 11, 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: 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.