Dear L.S.,
The speech pathologist may be reluctant to speak to you if your son is present. So first, I would recommend you ask for a phone or face-to-face meeting at a mutually convenient time.
I would ask for the clinician's impressions of your son's speech and any questions that you have related to that. I would ask what the treatment program is, how it is expected to help, what schedule of sessions is recommended and why. I would ask how I might participate, and I would ask for suggestions about the best ways to interact with my son.
It is likely that the clinician will prepare a written report for you that outlines this kind of information. He may want to review the report with you. If not, be sure to jot down any questions you have and arrange to discuss them with the clinician. In addition, it is likely that the clinician will keep you informed on an informal basis as you go along. If not, feel free to ask about what is going on and how you might be able to contribute.
Best Wishes,
Ruth Alice Jurey, M.S., C.C.C.
Speech/Language Pathologist