DS could read in preschool and I mentioned that to his teachers a few times and just kind of got a shrug with a "whatever" look. About 6 months into the school year one of the teachers stopped me after school and said "Did you know he could read?!" Apparently they had been in the school library and DS picked up a random picture book and started reading it aloud, fluently. The teacher asked him if that's a book he had at home, and memorized, and DS said "no". After that, one of the teachers listened to him read aloud regularly, for a few minutes per day and they seemed to try harder to challenge him.
When he was in 3 year old preschool he knew all the letters, letter sounds, could rhyme words, could do basic addition/subtraction, etc., and as soon as the teachers got out the academic "stations"....he would literally make a run for it. As in go out the door and run down the hallway. Since it was an integrated preshool there was a special ed teacher there and she started doing "interventions" to keep the behavior from getting out of control. I had put him in preschool because I thought it would be good for him to have structure, social relationships, work on fine motor skills, etc. and now I'm wondering if it was a really bad idea, and it just fostered his dislike of school (which he still has). He's much better behaved now but has a major attitude. Today I went in to drop off his slant board and he pulled me over to his desk, opened up the math workbook and pointed to the ridiculous stuff they were doing, like draw a math mountain for 8+5=13. He had a look of despair on his face, not a "this is so hard!" look but "this is so easy I'm going to go nuts" look. The teacher knows the situation--but I don't think she quite grasps how advanced he is. She asked something the other day like "so you can multiply?" ummmmm, he could multiply fluently over a year ago.