This run-on sentences worksheet and lesson helps middle school students learn how to identify and fix one of the most common grammar mistakes.

Designed for grades 6–8, this resource includes clear explanations, examples, and practice to improve sentence structure and writing clarity.

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Of all student usage "sins", writing run-on sentences is probably the most common, and one of the most grievous. Composition graders grit their teeth when they see this obvious sign of a lack of sentence control.

On multiple-choice assessments, including state assessments and the SAT, many questions are based on a student's knowledge of how to spot and avoid run-on sentences. This lesson gives numerous examples, plus examples of the three ways to fix a run-on sentence. Two practice worksheets are added after the lesson.

WHAT STUDENTS WILL LEARN:

• How to identify run-on sentences

• Why run-ons occur

• Three effective ways to fix run-on sentences

• How to improve sentence control and clarity

WHAT'S INCLUDED:

• Step-by-step lesson on run-on sentences

• Multiple examples of correct and incorrect sentences

• Two practice worksheets

• Writing-focused grammar instruction

WHY THIS RESOURCE WORKS:

• Targets a high-frequency grammar error

• Aligns with standardized test expectations

• Provides both instruction and practice

• Helps students build stronger writing skills

PERFECT FOR:

• Grammar lessons

• Writing instruction

• Test prep (state tests, SAT-style questions)

• Homework or review

• Middle school classrooms

TEACHING TIPS:

Have students correct run-on sentences and then rewrite them in multiple ways to reinforce understanding.