abcteach.com (don't remember how much it costs)
enchantedlearning.com $20 yr
ccvillage.com 7.95 / month
kidssoup.com $25 yr.
preschoolrainbow.org $20 yr

Free ones...

pre-kpages.com
atozteacherstuff.com
123child.com
childfun.com
dltk-teach.com
everythingpreschool.com
preschoolprintables.com

there are a ton more but these are the ones I use most......

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