Student resource · SATs & 11+ · PDF
The Ultimate Grammar Detective: Mixed Error Investigation
1. Classify the Clues Students investigate five flawed sentences. They identify whether each error involves: Tense Voice Punctuation They then explain the rule and rewrite each sentence correctly. 2. Crime Scene Statement Analysis
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What this is
The Ultimate Grammar Detective: Mixed Error Investigation
Breakdown
1. Classify the Clues
Students investigate five flawed sentences. They identify whether each error involves:
Tense
Voice
Punctuation
They then explain the rule and rewrite each sentence correctly.
2. Crime Scene Statement Analysis
Students examine a suspect’s statement containing several grammatical errors. They must find five different mistakes, name the rule being broken, correct each error and explain how the correction improves the writing.
3. Precision Corrections
Students complete four advanced editing tasks involving:
Direct speech and speech punctuation
Comma splices
Agentless passive voice
Past simple, past continuous and past perfect
Colons and semicolons
4. Rapid-Fire Edit Test
Students correct six mixed-error sentences. They identify the main error in each sentence and explain how it affects meaning, accuracy or formality.
5. Final Report Reconstruction
Students rewrite a complete flawed investigation report. They must correct errors involving:
Tense
Voice
Punctuation
Subject-verb agreement
They then explain which correction has the greatest effect on clarity.
What students get from this
By completing the activity, students will be able to:
Spot and correct complex grammatical errors.
Explain the rules behind their corrections.
Use punctuation accurately in formal writing.
Maintain consistent tense when describing past events.
Recognise and use active and passive voice.
Check subject-verb agreement.
Improve the clarity and formality of a paragraph.
Justify grammatical choices using precise vocabulary.
Edit independently rather than simply copying a corrected version.
Suggested timing
Short version: 30–40 minutes
Full challenge version: 50–60 minutes
Teacher review and discussion: 10–15 minutes
What you get
What students get from this
By completing the activity, students will be able to:
Spot and correct complex grammatical errors.
Explain the rules behind their corrections.
Use punctuation accurately in formal writing.
Maintain consistent tense when describing past events.
Recognise and use active and passive voice.
Check subject-verb agreement.
Improve the clarity and formality of a paragraph.
Justify grammatical choices using precise vocabulary.
Edit independently rather than simply copying a corrected version.
Suggested timing
Short version: 30–40 minutes
Full challenge version: 50–60 minutes
Teacher review and discussion: 10–15 minutes
What you receive
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Kept permanentlyListed in your account afterwards, to download again whenever.
Reuse it freelyPrint and use it as often as you need with your own students.
Revisions includedIf the author updates the file, the new version is yours too.
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