Here are some links for you to explore and review. Enjoy!
Rocks
www.steampoweredfamily.com/activities/growing-crystals-egg-geode-science-experiment/?jwsource=cl
Calendars
www.webexhibits.org/calendars/calendar.html
www.youtube.com/watch?v=soW3BfHghHg
www.youtube.com/watch?v=soW3BfHghHg
www.youtube.com/watch?v=kzprsR2SvrQ
www.youtube.com/watch?v=fvuVsqqP_lw
Cells
http://www.cellsalive.com/
Cell Video
http://www.youtube.com/watch?v=MfopLilIOeA
Bill Nye about Cells
www.youtube.com/watch?v=8DVrNRN84Do
Digestive System
http://mspalmersclassroom.weebly.com/grade-5-human-body-lesson-2-digestive-system.html
Mining
http://education-portal.com/academy/lesson/extraction-processing-of-minerals-surface-mining-subsurface-mining-smelting.html
https://www.youtube.com/watch?v=PeqtF7GEoZM
Simple Machines
http://www.msichicago.org/play/simplemachines/
http://www.wonderville.ca/asset/robot-factory
http://www.wonderville.ca/asset/medieval-levers
https://www.youtube.com/watch?v=e1nEUFYseII
Circulatory System
http://kidshealth.org/kid/closet/movies/CSmovie.html
Solutions and Mixtures
www.fossweb.com/teacher-home?redirect=/delegate/ssi-wdf-ucm-webContent/Contribution%2520Folders/FOSS/multimedia/Mixtures_and_Solutions/separatingmixtures/index.html
http://www.bbc.co.uk/education/guides/zgvc4wx/activity
Red Light Green Light Reaction Time
http://faculty.washington.edu/chudler/java/redgreen.html
https://faculty.washington.edu/chudler/introb.html#tn
Chemistry
http://studyjams.scholastic.com/studyjams/jams/science/matter/atoms.htm
Bill Nye Phases of Matter
www.youtube.com/watch?v=k3SJuozgbfU
www.youtube.com/watch?v=yQP4UJhNn0I
ed.ted.com/periodic-videos
www.msichicago.org/play/goreact/
Extreme Environments
www.openschool.bc.ca/ocr/science/sc6ee/