Many teachers see the advantages of teaching in a cross-curricular way: many are beginning to teach sciences in English, for example.
Here’s a list of websites with interesting science interactives in English for you:
Nutrition Explorations: http://www.nutritionexplorations.org/kids/main.asp
Kidshealth: http://kidshealth.org/kid/http://www.kidshealth.org/parent/general/
What in Dust? http://kids.niehs.nih.gov/baylor/dust.htm
Brainpop Jr. http://www.brainpopjr.com/
Cellsalive: Column on the left; click on “interactives”: http://www.cellsalive.com/
Chemicool: http://www.chemicool.com/
The Human Heart: http://www.fi.edu/learn/heart/index.html
How Stuff Works: http://health.howstuffworks.com/http://science.howstuffworks.com/
Howard Hughes Medical Institute: http://www.hhmi.org/biointeractive/index.html
Tox Mystery: http://toxmystery.nlm.nih.gov/
BBC-bitesize:
http://www.bbc.co.uk/schools/gcsebitesize/science/aqa/
http://www.bbc.co.uk/schools/gcsebitesize/science/edexcel/
http://www.bbc.co.uk/schools/gcsebitesize/science/21c/
http://www.bbc.co.uk/schools/gcsebitesize/games/rurevising/index.shtml
Kinetic City: http://www.kineticcity.com/
Un minut de ciència: http://www.edu365.cat/eso/muds/ciencies/minut_de_ciencia/index.htm?lang=en#
Nova Teachers: http://www.pbs.org/wgbh/nova/teachers/resources/subj_03_02.html
Medmotion: http://www.medmotion.com/gallery.shtml
Interactives.org: http://www.learner.org/interactives/