In the spirit of learning from others' mistakes, blogger Todd Finley outlines his biggest teaching blunders, and invites others to share theirs as well.
In honor of Edutopia's 20th anniversary, we're producing a series of Top 20 lists, from the practical to the sublime.
if there's a good education blog out there, you can bet it made our list. We've also mixed in a handful of exceptional web tools and sites that we thought deserved a spot in the top 200
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