Let me start off that Quill is terrible. To all the teachers making your class or planning to make your class do this, don't. Quill is so picky about word choices. If you don't get EXACTLY what is on the answer choices you are marked WRONG. To add insult to injury when students make a mistake it puts in no effort to help students correct their mistake, it just tells them that it is wrong and gives the most incomprehensible, and short examples. Please don't make your students do this. It is one of the most lackluster sites that won't teach your students to punctuate better and teach them to not use a variety of words in their punctuation. In conclusion, please don't ever assign Quill to your students to get better at grammar, there are a bunch of more sites that do more than Quill could ever do to help a student perfect their grammar.