Though I specialized in Germanic languages, I need to present (in a very simple way using a very simple language) some scientific topics in English to Italian 18-year-old-students (studying applied sciences) whose English is very poor. I'm seeking internet sites where everything is explained clearly and can be listened to at the same time.

Question

I've been given a booklet by the school containing short and abdridged newspaper articles on the various topics but there are no post-reading activities and the listening ones are missing.
The topics are as follows: DNA (a chemical contained in chromosomes), biology's big bang (Briefing RNA),HIV/AIDS:basic instructions), Chemical research and medicine, Astrophics 1 (birth of a star, death of a star, white dwarfs, neutron stars, black holes) Astrophics 2 (Olber's Paradox, Gravity won't allow a static universe, cosmological red shift, hubble's law, comsological principle, Omega factor, the Big Bang theory).

Please, give me a hand!

Answer 1

i don't know if this site has all of them but it might have some. try googling
khan university . it has videos with the man explaining things like chemistry, algebra, and all kinds of other things on a "blackboard"

Answer 2

http://www.khanacademy.org/

Scroll down to find all the subject areas and individual topics. It's an amazing website.