V.M.
conistency with how you treat kids and parents.
no worksheets,
play with the kids and assess if they know their colors or not before you spend 2 months teaching them the rainbow when ALLL of them Already Know it .
If you are going to put a pencil in the children's hands and tell them to write their name or what ever please please please teach them how to hold a penicl correctly and if their little muscles aren't ready give them playdough and other small fine work to do to strengthen the muscles before they try to write with the wrong grip.
Be smiley and fun. speak in a soft voice.