To proofread means to read something in order to find and correct mistakes. If you practice proofreading a paragraph that was written by another student, you will get better at finding the mistakes in your own writing. In this exercise, you will be proofreading a paragraph about airspace.
![proofreading](https://s3.amazonaws.com/smrtenglish.com/core/ENGL120AVIA/unit12/12-2w1.jpg)
Exercise
Open the exercise to begin the activity. Follow the instructions in the document.