Free Grade 12 Science Worksheets and Resources
http://www.testdesigner.com/questions/Science
Create a range of free printable science tests and quizzes for Grade 12 students. For advanced students there is the option to move to College level questions.
This site offers a range of science study material suitable for Grade 12. Free Grade 12 science worksheets covering Life Sciences, Chemistry and Earth Sciences. The site can be a little confusing but check out Study Tools and Games for some fun ways to learn. Probably not for anyone planning science at University.