Sophia Learning
Sophia: Comma Splices and Run Ons: Lesson 4
This lesson goes over comma splices and run-ons and discusses how to recognize them. It is 4 of 4 in the series titled "Comma Splices and Run-ons."
Khan Academy
Khan Academy: Recognizing Run Ons and Comma Splices
A seven-question quiz in which students choose the sentence with no errors.