I will ask about group sessions. Other kids don't seem to mind not understanding what he says. He doesn't seem to mind others not understanding him. He plays a lot of games with other kids where any speech is secondary to movement (knights, Star Wars, etc...). Recording the conversations sound like a good idea. I will have to try to find an unfamiliar adult willing to let me record them. We plan to homeschool him, like his older siblings, and even if we didn't, he has a birthday that misses the kindy cut-off in our area: he'd have another year of pre-K. The schools are legally required to provide services if we can prove educational impact, but in our experience with an older sibling with the local public school, it's hard for homeschoolers to show educational impact for kids who read and write well (which I feel like he is for his age). He had a well-child a couple months ago: his pediatrician actually commented on how much his speech has improved since his last one, but I didn't think to ask the pediatrician if he thought his speech was okay. We will see the ped again soon though, with the constant baby well visits - I will ask next time we bring the baby in if he'd give an opinion.