So he's almost 3 and he's not participating in the classwork at his child care center? Why? He's supposed to be able to pay attention for at least a little while during the day. Is he ADHD? Or just not able to sit for long?
I would really like to have more information. My 2 year old class had about 20-30 minutes of sit down at the table stuff to do each day. It might be making letters with Play-Doh or it might be tracing letters in sand even my 2 year old classroom was able to sit for a little while each day. We also played with manipulative's at the table so the kids would have a flat surface. Finger painting is an awesome table time activity. They get to feel stuff, squish it through their fingers, rub it all over the table, make squiggle lines, etc....
Your son is old enough to be sitting down in the classroom paying attention to the task at hand. Kids this age should be laying the groundwork for reading and writing, learning to see differences, using their mind for a lot of things besides just playing, . These are the types of skill's they should be working on. I'll also put some links below to give you some ideas of the things he should already know how to do, since he's not a toddler but a pre-schooler now these will be things he should have learned while he was still 2. He's almost 3 so he should have all of them down very well.
If he's getting done before everyone else he is old enough to know they want to finish their stuff. He could ask the teacher if he could get some puzzles out or color or do something at the table for sure.
So I say there's not enough information here. If they are just sitting at the table and not doing anything "interesting" that is age appropriate then perhaps you can educate them as to what you think is age appropriate for him that would hold his interest. Because it truly sounds like he's a toddler and not a pre-schooler.
I have over 13 years in child care and have owned my own center that had 2 full time teachers in the 2 year old classroom and 2 full time teachers in the 3 year old classroom. Occasionally we'd have a child that just didn't want to learn with the other kids. They'd want to play blocks or dress up and play with the homemaking toys. I'd give them things to do that went with the theme we were working on at the tables.
Like dinosaurs, if we were studying dinosaurs I'd tell them they could play in the block area and to build me a dinosaur farm or to play in the house area like they were the mommy dinosaur and how would it be different that being a mommy to a human baby. I kept the kids on track and "interested" even when I had eight 2 year old kids or twelve 3 year old pre-schoolers by myself. It isn't hard to engage a child's mind.
But from what you're saying the class is at the table doing something and he doesn't want to participate and is trying to get the other kids to stop working and play with him. If this is the way he's being then I'd mention it to you too and ask you how you got him interested in table work at home. If there was something that he liked to do more than other stuff. He can't have things that he likes to do all the time, they do have to sit down and learn but you might be able to suggest some ways they can appeal to him to get him to participate.
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Again, these links are to milestones for 2 year old kids so he should already be doing these very well. I'll also put a couple of links for 3 year old kids so you can see what he should be working on for the next year.
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2-3 years of age
http://www.pbs.org/parents/childdevelopmenttracker/two/in...
http://www.indianwomenshealth.com/2-Year-Old-326.aspx
http://www.parentcenter.com/preschooler.html
http://www.cdc.gov/ncbddd/actearly/milestones/milestones-...
http://www.healthychildren.org/english/ages-stages/toddle...
http://www.babycenter.com/303_milestones_###-###-####.bc
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3-4 years of age
http://www.pbs.org/parents/childdevelopmenttracker/three/...
http://www.indianwomenshealth.com/3-Year-Old-327.aspx
http://www.cdc.gov/ncbddd/actearly/milestones/milestones-...
http://www.healthychildren.org/English/ages-stages/toddle...
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Here's a link to show you what he should be able to do right now. If he isn't able to sit at the table and do work then how is he going to be doing a lot of this?
He is supposed to be learning how to cut, use glue, do 4 piece puzzles, use a paint brush, all sorts of things listed in the quiz. If he's not able to do these yet that's worrisome. He should have been sitting at the table learning to do these things for the past year.
http://www.preschooleducation.com/tcheck2.shtml