After your test...

http://education.jlab.org/indexpages/elementgames.html 

Energy Power Up:

http://sciencenetlinks.com/interactives/powerup.html

Build Your Own Rube Goldburg Device:

http://pbskids.org/zoom/games/goldburgertogo/index.html 

Review Newton's Laws:

http://pbskids.org/zoom/games/3puckchuck/3puckgame.html

KE and PE with a pendulum:

http://pbskids.org/zoom/games/pendulum/swing.html

Periodic Table Resources:

http://www.wou.edu/las/physci/ch412/perhist.htm

http://www.ptable.com/

http://www.uky.edu/Projects/Chemcomics/ 

http://www.chem4kids.com/files/elem_intro.html

http://education.jlab.org/itselemental/

http://chemicalelements.com 

Life Science Review:

http://www.sheppardsoftware.com/content/animals/kidscorner/games/foodchaingame.htm

Biome Review:

http://glencoe.mcgraw-hill.com/sites/dl/free/0078617464/167386/index.html

Cell Review:

http://cellsalive.com/cells/cell_model.htm

6th Grade Review:

http://www.edheads.org/activities/weather/

Circuits:

http://www.akidsmath.com/mathgames/ctreepuzzle.html

Simple Machine Review:

1.http://sln.fi.edu/qa97/spotlight3/spotlight3.html

2.http://www.mos.org/sln/Leonardo/InventorsToolbox.html

3.http://www.edheads.org/activities/simple-machines/  

Balancing Equations:
http://funbasedlearning.com/chemistry/chemBalancer/default.htm

Acids and Bases Review:

 http://sv.berkeley.edu/showcase/flash/juicebar.html 

Metric Units:

http://hs-staffserver.stjames.k12.mn.us/~fraken/Earth%20Science%20Files/Grade%208%20Practice%20Quizzes/measurementsquiz.html

 http://www.greatneckms.vbschools.com/mth6_docs/conprac.htm