Lots of Resources also on echalk http://www.echalk.co.uk/
Nature,Habitats. Human body, night and day, moon.
http://www.woodlands-junior.kent.sch.uk/Homework/scidex.html

Channel 4 Science Essentials
http://www.channel4learning.com/sites/essentials/science/index.shtml

Sound.Chapter 9
Video. http://www.neok12.com/Sound.htm
http://library.thinkquest.org/10796/ch14/ch14.htm

Light. Chapter 10
http://library.thinkquest.org/10796/ch14/ch14.htm
http://www.eirgridprojects.com/kids/
http://www.rp-l.com/rplkids.htm
http://www.switchedonkids.org.uk/

Electricity. Chapter 11
http://library.thinkquest.org/10796/ch14/ch14.htm
http://www.neok12.com/Electricity.htm

Materials.
http://www.bbc.co.uk/schools/ks2bitesize/science/materials/
http://www.bbc.co.uk/schools/scienceclips/ages/7_8/characteristics_materials_whatnext.shtml
http://www.channel4learning.com/sites/essentials/science/material/index.jsp

Magnetism.
http://www.explainthatstuff.com/magnetism.html
http://www.kidskonnect.com/subject-index/15-science/90-magnets.html
http://www.creativekidsathome.com/science/magnet.html

Floating and Sinking.
http://www.askaboutireland.ie/learning-zone/primary-students/please-select/3rd-+-4th-class/science/floating-and-sinking/
http://www.kids-science-experiments.com/cat_floating.html

Human Body
http://www.bbc.co.uk/science/humanbody/body/index_interactivebody.shtml

Digestive System.
http://kidshealth.org/kid/htbw/digestive_system.html
Animation. http://kitses.com/animation/swfs/digestion.swf
http://www.youtube.com/watch?v=2ea7LtEZOYk&feature=related

Resipatory system.

http://www.youtube.com/watch?v=u7pYMD6or70&feature=channel
http://www.cyh.com/HealthTopics/HealthTopicDetailsKids.aspx?p=335&np=152&id=2406
http://www.kscience.co.uk/animations/lungs.swf

The Skeleton.

http://www.youtube.com/watch?v=7vLAE_P_u_4&feature=related
http://www.cyh.com/HealthTopics/HealthTopicDetailsKids.aspx?p=335&np=152&id=2523
Interactive http://sv.berkeley.edu/showcase/pages/bones.html
interactive http://www.e-learningforkids.org/Courses/Liquid_Animation/Body_Parts/Skeleton/index.html

Plants.
Video. http://www.neok12.com/Plants.htm
http://www.mbgnet.net/bioplants/
http://www.fi.edu/tfi/units/life/
http://www.woodlands-junior.kent.sch.uk/Homework/fooodchains.htm


Cool Science for curious kids
http://www.hhmi.org/coolscience/

Teach kids well science site
http://www.teachthechildrenwell.com/science.html