Here is a Grammar Starter powerpoint with 6 grammar lessons. Each lesson contains two sentences filled with several errors. Answers for each slide are at the end of the powerpoint.
These sentences come from an old textbook adoption handbook that I once used in my teaching. I usually had to increase the number of errors in each sentence. 9th grade students did not find the errors difficult.
Each slide usually contains one tricky problem. All of the sentences serve as reminders of the small ticky details that students often overlook in their own writing. These are the same ticky details that often irritate us in the world at large. A perfect example is ladie’s above the ladies’ restroom door.
Two lessons a week work well (Mon. and Wed.), followed by a review of any problems that were spotted (Tues. and Thurs.)
Expect capitalization, end mark and quotation mark problems, usage and verb tense, subject/verb agreement, commas with nonessential phrases, and run-on sentences (fused sentences) among other problems.
The next Grammar Starters will be issued on September 19. That slide series will contain 16 lessons (or 8 weeks of lessons).