There has been an error in the display of this page. There has been an error in the display of the nav on this page. Click on an exercise title to enter the exercise page. Exercise 1: Correcting words often confused (there vs. their) Exercise 2: Avoiding double negatives Exercise 3: Identifying mistakes with final S's Exercise 4: Editing for grammar errors in a response essay Exercise 5: Editing for grammar errors in a persuasive essay Exercise 6: Editing for grammar errors in a sociology paper There has been an error in the display of this page.