For ATP Flight School, only their ground school (ATP CTP) is VA approved. The flying portion is not. It says very explicitly on their website, I even called them to make sure. If you want to find a place where you can use your post 9/11 GI bill, go to this website: http://inquiry.vba.va.gov/weamspub/buildSearchInstitutionCriteria.do;jsessionid=qtMbSxQFpzyL7GpnQrtnNGv6G9CGQQvb2YqM9Cvw3vB2pv2lXhfJ!-1531379871 and use the dropdown to select flight training then pick the state. You then have to drill down to find which exact programs are approved (CFII, ATP SE, ATP ME, commercial, etc...). THEN (and this is the important part) you have to actually call the school and ask them if they have an ATP ME VA approved course. Just as an example in my state (CA) there are 9 schools that are VA approved for ATP ME, and TWO, I repeat TWO that actually offer that training. As a side note, you MUST have your COE and a current class 1 to start training. Good luck, I still haven't done mine but will start training in a couple weeks.