"Would You Rather" writing prompts. (You will need to copy, paste and print because this link is broken.) Great ice breaker, too!
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SmallWorld: 100 Not-Boring Writing Prompts for Middle- and High Schoolers These could be fun prompts for rehearsal warm ups
100 Creative Writing Prompts
100 Writing Prompts: Do you have students that say, “I don’t know what to write about! Here is a quick fix! Put these writing prompt labels in a folder, and let children choose a label when they are stuck and just can’t think of anything to write about.
Parts of Speech Sheet
Scholastic website - free printable parts of speech sheet
FREE Standard English Grammar Cheat Sheet and Grammar Sort Sheet