Check out these resources to enhance your science curriculum in the Primary Grades
Earth Day
Dental Health
Dinosaurs
Plants
Geography
Simple Machines
Photosynthesis
Body Systems
New York Science Teacher:
http://newyorkscienceteacher.com/sci/pages/teacher-sites-subject.php?pageNum_usersites=2&totalRows_usersites=27&subject=Earth%20Science
Khan Academy
https://www.khanacademy.org/
Water and Pollution
Matter