Rather, do you need TE schools that cover full tuition or are those that use the set rate ($44k for SY26-27, per TE’s site) okay?
I was going to advise looking at the acceptance rate range for TE, but it appears it is no longer on the website. That said, for many TE schools (especially those that most people “know”), TE is very challenging to receive and one should plan to be one of the school’s top applicants to improve your odds. Not only did many TE schools have fewer than 10% of TE applicants receive a TE offer, many of them might have had something more like a 1% offer rate. All of that said, the reachier the school is for a student to be admitted, the less likely one is to receive TE, from my observations.
@Excel_Dad helped set up workbooks that CC users filled out with the stats of their students and what schools they ended up receiving (or not) TE from. He may also have some additional advice on the overall TE process.
How has your son done on his APs? Does he have an SAT or ACT score? And what is a 3.6 GPA like at his school? Is it a school where lots of students have a 4.0, or are 4.0 students a rare breed? Or rather, approximately what percentile would the 3.6 place him (top 10%, 20%, 50%, etc)?