Below are links to website where you can read articles or do activities to get extra credit. DON'T FORGET TO FILL OUT THE RUBRIC AND BOOK-KIT FORMS - even if it's not a book.
You can always read articles from other sources, but you need to make sure they are reputable sources.
Our textbook website, it has many activities and practice tests: http://www.phschool.com/science/
Science Daily website - you must choose appropriate materials to write about. Ask your parent, me, our your priest if you are unsure about what "appropriate" means.http://www.sciencedaily.com/