Learning Centers

Kidergarten Science Learning Centers
http://www.kindergarten-lessons.com/kindergarten-science-center.html

Setting Up Hands-On Science Center
http://www.teachersnetwork.org/ntny/nychelp/manage/scisetup.htm

Managing Science in the Elementary Classroom (read to the bottom where there is information about science centers)
http://teachingtoday.glencoe.com/howtoarticles/managing-science-in-the-elementary-school-classroom