Strategies
A to Z Teacher Stuff: This site has tons of great lesson plans and thematic units for all grades! www.atozteacherstuff.com

Dr. Pam Petty: Dr. Petty's site has resources for literacy, technology, and many other useful bits of information for teachers. 
www.pampetty.com

ABC Teach: This site contains useful thematic units, lesson plans, and fun activities for children.  www.abcteach.com

Enchanted Learning: This site has tons of great activities for children.  It also contains a picture dictionary that is super!  www.enchantedlearning.com

Jan Brett: This site is full of neat activities to integrate with books by Jan Brett.  www.janbrett.com

MarcoPolo: This search engine is a great source for teaching searching for Internet based curriculum.  All of the lesson plans and activities found on this site are standards based. 
www.marcopolosearch.org

Kevin Henkes: This site contains great activities to go along with books by Henkes.  www.kevinhenkes.com

Houghton Mifflon: This site contains useful information for reading/languate arts, math, science, and social studies.  This site also contains monthly themes and games.  www.eduplace.com

Virtual Field Trips:  Take your students to this site on a virtual field trip! 
www.b-g.k12.ky.us/Schools/mcneill/virtual.htm

Kids Domain: This site contains brief reviews and articles about educational software programs
www.kidsdomain.com