You already have the answer in your question. >He doesn't want to practice his exercises at home.  > This was me. Speech therapy at that age through 16 when I finally stopped going. "Because it wasn't helping." I went back to the same therapist 10 years later and was able to get fluent in a little more than six months. The only difference was me. I did the exercises every day. I worked at it. 30 minutes, twice a day, and the therapy advances quickly. I use analogies of going to the gym or learning an instrument. If the only time you pick up the weights or practice the instrument is during your one hour a week with the trainer or teacher, you won't make any progress. You have to do the work every day. Then the hour a week with the trainer, teacher, or speech therapist is of much greater value. They can evaluate your progress, guide you, make adjustments. There will be setbacks. Sometimes when you go to the therapist, they will see you're struggling or using poor form. A good therapist will take you back a couple of rungs, and realign you. But if the only work you're doing is at the therapists, it's futile. IDK what your 13 yo spends time on, or what skills they are developing. But maybe put it in the context of that. Let's say they like first person shooter games. Ask them how good they'd be if they only played an hour a week? How much better everyone else would be? Teenage males can be close minded. Often they are getting to the age where they know everything. Too many of us *know* that we'll always stutter. At his age, I knew it. Obviously, I was wrong. In the end, it's a "lead the horse to water, but you can't make them drink" scenario. I *always* advocate for speech therapy. I truly believe in it. That being said... Stop the speech therapy. Until he's ready to do the work, it's a waste of everyone's time. Let him know that when he's ready to do the work, therapy can resume.