Documents and Links
Standards:
http://ed.sc.gov/instruction/standards-learning/science/support-documents-and-resources/
https://ed.sc.gov/scdoe/assets/File/instruction/standards/Science/Grade%207%20Science_SupportDocument2_0.pdf

Test Prep:
http://www.usatestprep.com/South-Carolina-Middle-School-Online-Review

More on Content:
http://www.biology4kids.com
http://www.chem4kids.com
http://sciencespot.net/Pages/kidzone.html