How I Use It
I tried this product in my classroom as a grammar teaching resource. Students created accounts and then I assigned them lessons on specific CCSS topics. I think that their concept of teaching grammar through proof-reading is a good idea since it gives the grammar objective some context, but I don't think that it has been developed enough to be truly useful. The practice lessons where students "learned" the concept were essentially online worksheets and the proof-reading lessons were too easy for most of my 8th grade students.
In addition, since students are asked to rewrite the entire sentence (forcing them to spend more time thinking about the senentce), other mistakes (misspelling something, leaving out a word) causes a student to "miss" the question. As a teacher, when looking at my scoreboard (where the students' results are), I can't tell why a student has an orange box for that standard (rather than a green box which means there were no mistakes). Did she not understand the skill? Did she misspell something? Did she miss one? or three? What did she miss? This is annoying because the value of having students complete grammar activities online is being able to quickly pinpoint strengths and weaknesses.
I liked that I could assign students different standards, making it individual. I liked that it had students practice the skill in context. Also, it was clear that they had thought about breaking down common grammar mistakes so that students worked on them in smaller chunks (such as learning the difference between when to use "which" and when to use "that" in a sentence).
Still, as it stands, Quill isn't useful enough to make it a grammar program for my classroom. I might continue to use it with students who really struggle with grammar for additional practice (and so I don't have to purchase a grammar book for them) but it isn't robust enough to use regularly with all my students. I think that for Quill to be useful to teachers, they will have to further develop the information teachers receive, how students are taught/introduced to the grammar skill, and develop more levels for middle school students/advanced students.