Lesson Plans
http://homeschooling.about.com/cs/unitsaz/index.htm - A-Z Unit Studies
http://209.254.133.66/pls/eadsrel/ho_start.enter - EADS Education Access Design System
http://www.edhelper.com/ - Lesson Plans, worksheets, etc.
http://www.enchantedlearning.com/Home.html - Lesson ideas from A-Z 
http://edsitement.neh.gov/lessonplans.html - K-12 lesson plans in literature and language arts, foreign language, art and culture, and history and social studies.  Can be sorted by grade level.
http://www.schoolexpress.com/ - Worksheets, Online Activities, Award Makers, etc. 
http://www.teachersnetwork.org - Curriculum/lesson plan search by subjects and grade levels. 
http://thechalkboard.com/ - The Chalkboard - "A Classroom Corporate Connection" - This site provides educators with lesson plans and classroom resources from corporations. 
http://www.sitesforteachers.com/ - Over 15 pages listed here on this, "Sites for Teachers!" 
 

Math
http://www.learnnc.org/dpi/instserv.nsf/6703f630096b753e052564e500571b7c/8462596deb523cb085256c3a006c1be2?OpenDocument - 2003 Mathematics Standard Course of Study
http://www.amathsdictionaryforkids.com/maths/dictionary.html - A Maths Dictionary for Kids - An animated, interactive dictionary that explains over 400 common mathematical terms.
http://www.enc.org/features/calendar/unit/0,1819,8,00.shtm?ls=eu - ENC Online: Begin the Year with Money Activities
http://images.rbs.org/teaching/index.html - Images - Improving Measurement and Geometry in Elementary Schools
http://www.learnnc.org/dpi/instserv.nsf/Category7?OpenView&Start=1&Count=30&Expand=2#2 - Instructional Resources for Mathematics
http://www.scottforesman.com/investigations/ - Investigations - Online teaching center for Investigations users
http://www.mathgoodies.com/ - Mrs. Glosser's Math Goodies - Interactive math lessons, worksheets, puzzles, forums, and more!
http://www.mathsolutions.com/newsletter/ - Math Solutions Online Newslsetter
http://www.enc.org/features/calendar/unit/0,1819,71,00.shtm?ls=eu - ENC Online: September Sums (Grades K-3)

Microsoft Office Tutorials
http://www.actden.com/ - Digital Education Network - A resource for online learning with free software tutorials and online courses. 
 

Primary (Grades K-2)
http://www.edupuppy.com/ - Categories of Web resources from A-Z! 
http://www.kinderkorner.com/ - Victoria Smith, a teacher in California provides a wealth of valuable information and teaching ideas for grades PreK-2.
http://www.preschoolprintables.com/ - Preschool Printables - Print awards, calendars, certificates, etc.
 

Professional
http://school.discovery.com/teachingtools/teachingtools.html - DiscoverySchool.com's Teaching Tools such as an online Puzzle Maker, Lesson Planner, Quiz Generator, and more.
http://www.education-world.com/ - Education World - A wealth of resources for teachers.
http://www.enc.org/features/calendar/ - ENC Online: Classroom Calendar of ready-to-go activities.
http://www.epals.com/search/ - ePals Classroom - A great resource for finding another class to communicate or collaborate with.
http://keypals.com/ - KeyPals - The modern day penpal site.
http://www.ncpublicschools.org/educators.html - The NC Publicschools.org Educator's site
http://www.ncpublicschools.org/curriculum/ - The NC Standard Course of Study
http://www.ncwiseowl.org/sites_teacher.htm - NC Wise Owl Essential Teacher Web Sites
 

Reading & Language Arts
http://keypals.com/ - Read-Write-Think - This site provides educators and students quality practices and resources in reading and language arts instruction.

Report Cards
http://www.teachnet.com/how-to/endofyear/personalcomments061400.html - Report Card Comments
http://www.occdsb.on.ca/%7Eproj1615/Rep4.htm - Suggested Report Card Comments for Mathematics (for 6th grade, but these could be adapted to lower grades)

Rubrics
http://www.odyssey.on.ca/~elaine.coxon/rubrics.htm- Rubrics from The Staff Room for Ontario's teachers
 
Science
http://www.fi.edu/fellows/fellow9/jun99/index.html - Learn all about frogs (a K-3 and 4-8 version) at the Franklin Institute Online. 
http://216.37.53.73/geomysteries/index2.html - GeoMysteries - Rocks and Minerals http://olp.swlauriersb.qc.ca/webquest/plants.htm - Students go on a Web hunt to investigate seeds, germination, etc. 

Social Studies
http://www.peacecorps.gov/kids/ - Peace Corps Kids World
http://www.socialstudiesforkids.com/ - Social Studies for Kids
http://www2.wcpss.net/CandI/socialstudies.htm - Social Studies curriculum

Student Research Resources
http://www.ala.org/parentspage/greatsites/amazing.html - 700+ Great Sites for Kids and the Adults who Care about Them!   
http://www.ajkids.com - Ask Jeeves Kids 
http://www.enchantedlearning.com/Home.html - Enchanted Learning offers information for students on topics A-Z.  This is a GREAT site! 
http://www.rcls.org/ksearch.htm - Kids Search Tools - A listing of eleven search engines for students 
http://www.yahooligans.com/ - Yahooligans!  The Web Guide for Kids 
 

Theme Units
http://www.northcanton.sparcc.org/~greentown/grtheme.htm - Theme Units and Online Activities
http://lovetoteach.homestead.com/Themes.html - First Grade Themes & Units
http://myschoolonline.com/folder/0,1872,12305-144016-15-38773,00.html - Mrs. D'Antuono's First Grade

Web Lists
http://www.eduhound.com/mainpage.cfm - EduHound - A directory of over 20,000 links in more than 50 categories! 
http://www.kn.pacbell.com/wired/bluewebn/index.html - Pacific Bell's Blue Web 'N - This site is a library of "Blue Ribbon" learning sites on the Web. 
 

WebQuests - Student Projects
http://webquest.sdsu.edu - The WebQuest Page 
http://www.webquest.fwcs.k12.in.us/webquest_site_folder/wqlessons.htm - A collection of Webquests from Fort Wayne County Schools, IN.
http://www.manteno.k12.il.us/webquest/elementary/elementary.htm - A collection of Webquests from the Manteno Schoo District, IL.
http://www.mtlakes.org/ww/tech/webtools/webq.htm - A collection of WebQuests for elementary teachers.
http://oncampus.richmond.edu/academics/education/projects/ - A collection of Webquests from Richmond University.
http://www.west.asu.edu/achristie/wqmatrix.html - Dr. Alice Christie's Matrix of 400 Webquests.
http://www.harlingen.isd.tenet.edu/webquests.html#elem - Webquests for elementary students.
http://sesd.sk.ca/teacherresource/webquest/science.htm#Elementary - Webquests from Saskatoon (East) School Division.
http://tqe.siu.edu/webquest/html/science.html - Science webquests.
http://www.wayland.k12.ma.us/loker/wequests.html#abc - Wayland Public Schools' Elementary Webquest Page
http://www.msad54.k12.me.us/MSAD54Pages/Curriculum%20Resources/Webquest.html#A - Webquests A-Z