Please get a professional intervention now -- do not wait. If he has any issues going on, it's infinitely better to get them recognized and dealt with early; the longer you wait, the harder it will be for him to change his speech.
When you say he "can't make a complete sentence," that does not sound like a speech issue -- speech therapy is about helping kids with the formation of sounds. Not being able to structure a complete sentence -- if you mean he cannot arrange his thoughts into the right words -- is not a speech therapy issue but a possible developmental and learning issue. If you actually mean that he stutters and can't get words out, yes, that might be more a speech issue rather than a developmental thinking issue but it's hard to tell from the post.
I would see the K teacher in person today and be sure to give a very detailed set of examples of the problems you have seen. Ask what the school provides in terms of speech therapy and other interventions. And then, separately from whatever school wants to do, I would take him to the doctor ASAP and get a fast referral to whatever specialist is needed to start evaluating his speech problems. He may just need speech therapy for sounds and getting words out, or he may need other interventions if he really can't make sentences because he can't put the thoughts together verbally.
Good luck. Early intervention is critical so get this ball rolling today. There are SO many interventions available that you WILL find what he needs so be confident that this is something you and he and the professionals will get through!
Updated
Please get a professional intervention now -- do not wait. If he has any issues going on, it's infinitely better to get them recognized and dealt with early; the longer you wait, the harder it will be for him to change his speech.
When you say he "can't make a complete sentence," that does not sound like a speech issue -- speech therapy is about helping kids with the formation of sounds. Not being able to structure a complete sentence -- if you mean he cannot arrange his thoughts into the right words -- is not a speech therapy issue but a possible developmental and learning issue. If you actually mean that he stutters and can't get words out, yes, that might be more a speech issue rather than a developmental thinking issue but it's hard to tell from the post.
I would see the K teacher in person today and be sure to give a very detailed set of examples of the problems you have seen. Ask what the school provides in terms of speech therapy and other interventions. And then, separately from whatever school wants to do, I would take him to the doctor ASAP and get a fast referral to whatever specialist is needed to start evaluating his speech problems. He may just need speech therapy for sounds and getting words out, or he may need other interventions if he really can't make sentences because he can't put the thoughts together verbally.
Good luck. Early intervention is critical so get this ball rolling today. There are SO many interventions available that you WILL find what he needs so be confident that this is something you and he and the professionals will get through!