Simplify the language because a computer screen is more difficult to read than hard copy. Sentences need to be much shorter and to the point, with easy grammar and vocabulary.
You need someone else to check your work and proof-read it again for any minor editing that you did after loading it to Moodle. It's nearly impossible to see your own mistakes. You need to check for stylistic things, too. Is the language too formal? Too informal? Too convoluted? Too wordy?