Before you start
Think it through before you edit
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Diagram Detective The signature mechanic: build a sentence’s Reed-Kellogg diagram — place each word into its role. See grammar as structure. 
Revise the Sentence Apply a rule to actually improve a sentence — fix a run-on, pick a stronger verb, cut the wordiness — then see why it works. 
Grammar Crimes Tap the word hiding the error — spot the grammar crime in the sentence. 
Adventure Map A path through all 16 kits — clear each stop, then move on. All activities
Build & diagram
Diagram Detective Build a Reed-Kellogg diagram — place each word into its role. Revise the Sentence Improve a sentence with a rule, then see why the revision works. Grammar Myths Real rule or zombie rule? Predict, then a reveal shows the natural, correct usage. Sentence Unscramble Tap the shuffled words into the right order to rebuild the sentence. Sentence Combining Turn choppy short sentences into one smooth one — and name the mistakes.
Skill drills
Punctuation Missions Drop the right mark into the gap. Punctuation Meaning-Shift Same words, one mark apart — predict what the punctuation makes it mean, see both readings, then say why. Style Editing Pick the strongest rewrite. Clause Combining Join two ideas with the right conjunction. Grammar Crimes Tap the word hiding the error. Parts of Speech Label every word’s part of speech.
Learn & practice
Concept kits 16 grammar kits from parts of speech to advanced editing — a hint whenever you get stuck. Mixed Practice A short round shuffling questions from the kits you have played — spaced out so it sticks. Grammar Sprint Race your OWN best on what you already know. Timer optional, no penalty for a miss. Trick Questions Brain-teasers with a twist — spot why the obvious answer is a trap. Teach the Cast Teach a rule to a cast member still learning it — teaching makes it stick. Progress Your levels, streak, and how each rule is coming along — saved on this device. Progress report For grown-ups — a private on-device snapshot mapped to the grammar skill areas. Export a CSV or print.
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Concept Kits — grammar, kit by kit
Kit 1: Nouns, Verbs, Adjectives Sentence Diagramming · 25 questions Kit 2: Pronouns & Antecedent Agreement Grammar Crimes · 25 questions Kit 3: Subject-Verb Agreement Grammar Crimes · 25 questions Kit 4: Simple, Compound & Complex Sentences Clause Combining · 25 questions Kit 5: Commas & Semicolons Punctuation Missions · 25 questions Kit 6: Apostrophes: Possession & Contraction Punctuation Missions · 25 questions Kit 7: Verb Tense Consistency Style Editing · 25 questions Kit 8: Commonly Confused Words Style Editing · 25 questions Kit 9: Parallel Structure Clause Combining · 25 questions Kit 10: Modifiers: Dangling & Misplaced Grammar Crimes · 25 questions Kit 11: Critical Analysis & Evaluation Sentence Diagramming · 25 questions Kit 12: Integration & Review Sentence Diagramming · 25 questions Kit 13: Cross-Topic Connections Sentence Diagramming · 25 questions Kit 14: Real-World Applications Style Editing · 25 questions Kit 15: Misconceptions & Reasoning Grammar Crimes · 25 questions Kit 16: Advanced Synthesis Sentence Diagramming · 25 questions
More ways to play
😄 Brain break
Meet the cast — the characters who teach this
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Mayor Subject Subject (noun/pronoun performing the action) -
Verb Verity Verb (action / state of being) -
Object Otto Direct / indirect object (receiver of the verb's action) -
Modifier Mike Adverb (modifies verb / adjective / other adverb) -
Modifier Madge Adjective (modifies noun / pronoun) -
Connector Chen Conjunction (coordinating / subordinating — *and*, *but*, *because*, *although*) -
Pronoun Perry Pronoun (substitute for noun — *he*, *she*, *they*, *it*, *who*) -
Article Anne Article (*a*, *an*, *the* — definite vs. indefinite) -
Preposition Pat Preposition (spatial / temporal relations — *on*, *under*, *between*, *before*) -
Clause-Chief Carla Clause-types (independent / dependent / subordinate / relative) -
Punctuator Polly Punctuation guardian (commas, semicolons, apostrophes, colons, dashes) -
Agreement Ada Subject-verb agreement (singular subject → singular verb; plural subject → plural verb; tricky cases — collective nouns, *either/or*, indefinite pronouns)
Ensemble stories — the cast together