Science Online

http://classroom.jc-schools.net/sci-units/

This project uses technology to deliver K-8 science curriculum aligned to Tennessee's standards.  Although it's not aligned to Kentucky standards, there are lots of good links to lesson plans, interactive sites, and content links.  It is divided by grade level and area of content. 

Monster Exchange

http://www.monsterexchange.org/

"Monster Exchange is designed to encourage the development of reading and writing skills while integrating Internet technology into the classroom curriculum. Classrooms from a variety of schools worldwide are paired together; the students in each classroom are split into groups, each of which designs an original picture of a monster. The students must then write a description of the monster. The partnered classes then exchange their descriptions via e-mail and the Internet. These students are then challenged to use reading comprehension skills to read the descriptions and translate them into a monster picture. The true challenge involves creating a redrawn picture as close to the original picture as possible without looking at the original and using only the written description of the monster."

LearningPage.com

http://www.learningpage.com/

This site has worksheets and other resources to go with many themes (Olympics, Oceans, Dinosaurs, Time, etc.) and topics covered in the elementary grades.  It does require membership, but it's free.  Some of the worksheets are available without a membership.

Storyline Online

http://www.bookpals.net/storyline/index.html

This site features online streaming video of celebrity-read stories complete with interactive lessons and activity guides.

Plants in Motion

http://sunflower.bio.indiana.edu/~rhangart/plantmotion/PlantsInMotion.html

This site was created for educational use by a professor at Indiana University.  Series of time-lapse photographs were put together to create movies of such things as seed germination and flower development as well as other changes in a variety of plants.