What's worth buying in bulk.and what's not - Your mileage may vary however. I do often buy cereal at Costco - but I always watch the unit cost. I tend to set a target price per and there is often a good option at or below my target.
how to prepare for Open House night and get a head start on learning about your students! I especially love the idea of an "About the Teacher" page and a page letting parents know all of the awesome things their children will be learning that year.