Well I know many preschoolers know numbers but do they understand numbers? I have a preschooler (3 1/2) and also teach at his co-op once a week with 2 other kids. We did a numbers lesson last week where you have numbered pieces of cardstock (1-10), and clothespins with #, dots and on the opposite side the number spelling and dots and you are supposed to match the clothespin with the cardstock and clip it. I read a couple of counting books and then we did our lesson. This didn't turn out well with any of the kiddos. I am not sure if this is too advanced or if I should work on it more? I spent one-on-one time and tried to explain to count the dots, match the numbers but it just seemed to be too much. My son is the one who tells me "you're not my teacher, you're my mom" so basically he doesn't want to participate in anything.
Also, what do you think should be first - numbers or letters ? It is a "hands-on" class so I try to do things that are educational and fun but that is just a small portion of the class, we also do coloring, playing with toys, etc; (for next week I have an "i" letter activity- for igloo - a couple books and then pasting white squares of paper onto a blue paper with an igloo).