Grade 3 Reading and Debugging Code Computer Worksheets
Grade 3 computer science practice: Read a program and debug it using evidence from tests.
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Sample reading and debugging code questions
Read each test result and choose the kind of bug the evidence points to. These examples come from the Easy setting; every generated worksheet draws a fresh set.
- A lamp should switch on when the room is dark, but the code tests IF the room is bright. What kind of bug is this?
mismatched name · wrong condition
- A square needs four sides, but the code says REPEAT 3 times: move and turn right 90. What kind of bug does the open shape show?
missing step · wrong number
- A program saves the file before the new title is typed, so the old title stays. What kind of bug is this?
wrong order · wrong number
- The code sets a variable called total but later changes a variable called totl, and the display never moves. What kind of bug is this?
mismatched name · extra repeat
Check the sample answers
- wrong condition
The test checks the opposite of what the task describes. - wrong number
The repeat count is one less than the four sides required. - wrong order
The save runs too early to include the change. - mismatched name
Two different names create two separate storage places.
Practice focus
A bug is a mistake in code. Test results are evidence that shows which step is wrong, so a fix can be checked afterwards.
Grade placement is a planning guide for choosing practice. The registry records standard-code mappings as unreviewed, so these pages are not a claim of alignment with a national standard.
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View worksheets →About these worksheets
Read a program and debug it using evidence from tests. These Grade 3 computer science worksheets stay with that single skill: every question is answerable from the printed page, and the answer sheet explains why each answer is correct.
How to use the worksheets
- Choose a difficulty, then read the printed directions before answering the first question.
- Complete the questions on paper, marking one answer for each item.
- Compare the result with the answer sheet and read the short explanation together.
How this practice can help students
A bug is a mistake in code. Test results are evidence that shows which step is wrong, so a fix can be checked afterwards. Generating the page again keeps the same learning goal while changing the questions, so a learner can revisit the skill without repeating the same items.
Review and next steps
Ask the learner to say what made one answer better than the others. Grade placement is a planning guide for choosing practice. The registry records standard-code mappings as unreviewed, so these pages are not a claim of alignment with a national standard.
Read a program and debug it using evidence from tests in Grade 3
Grade 3 computer science practice: Read a program and debug it using evidence from tests.
How to use these worksheets
- Choose a difficulty that lets the learner succeed, then move up.
- Press Generate for a new set of questions whenever more practice is needed.
- Print the sheet and keep the optional answer page to mark it in seconds.
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