My advice is use teachers you already have had that can testify to your hard work, effort, mastery of a subject, type of person you are, etc. Teachers for your senior year, unless you have had them before, can't do that. Something else we realized in the process. It is good to ask the teachers now or before school ends AND make them aware of the Service Academy application timeline. Most of them are off in the summer so when your portal opens - and you put their name and contact information into the portal - they will likely be off. You will need to kindly ask them to have their letters ready by mid-late July so you get them submitted early. The SAs will email them directly with access to the portal, etc. They may not be able to check their school email until school returns, just know that and follow up as soon as school is back in session. The process/requirements for letters for Nominations and each SA is different so be respectful of their time and give them ample time to do all this amazing work on your behalf. One thing - our school's firewall actually blocked the emails from one SA and the college counselor had to get involved to help make sure teachers received the emails. The SA Admissions rep had seen it before and knew how to maneuver - but just so you are aware that this can happen. It did slow down the math and english evaluation process but only until we figured out the problem.