Challenge 20/20 is an Internet-based program that pairs classes at any grade level (K-12) from schools in the U.S. with their counterpart classes in schools in other countries; together, the teams (of two or three schools) find local solutions to one of 20 global problems.
Wacky Science Day 2012!!! During the last week of school first graders spent the day as wacky scientists. It was a day filled with excitement, fun, mess and lots oohs and ahhs! The wacky scientists experimented with slime, fizzing potions, poked polymers and all sorts of other wild and wacky experiments.
Excellent hashtag #pypchat for early childhood and maybe up through 3rd grade teachers. This link is to their wiki. Pretty new hashtag group - Droke's, Cumming's, and Diaz's favorite WhatEdSaid tweets here!