So glad that I finally joined the community! My name is Steve Brownlee and I'm the Lead Instructor at Nashville Software School, which is was the first non-profit software development bootcamp in the US.
I started using Github Classroom for our 11th cohort back in October of 2015 and it's been an invaluable tool ever since. Being able to create individual exercises, group exercises and assessment repositories in our Github organization, and then let student work on their own copies of it vastly reduces the manual labor and confusion that would exist without Classroom.
Since DVCS via Github is a Core Skill that our students must be strongly proficient in upon graduation, having another tool that integrates with their workflow strengthens their knowledge even more.