You would make a social language goal in the IEP (has to be specific and measurable). Objectives could look something like this:
--DS will thank a teacher who has helped him at the end of the interaction, measured in 3/5 trials over three periods of the day [could be specified; you want to specify settings that will be assessed]
--DS will wait until a teacher is available to speak to him in order to begin interaction appropriately, measured in 3/5 trials over three periods of the day
--DS will be out of his seat only once more than typical peers...
I don't know if you actually want to extinguish the last one right away. It may make everything worse. You may want to put into the plan that he can have three out of seat tickets per day, given him at the start of the day, and just has to hand one to the teacher to get a break.
