California content standards for seventh grade science (7th grade standards are on page 31 of the textbook also) http://www.cde.ca.gov/be/st/ss/documents/sciencestnd.pdf
A website that has great lectures on various topics in all subjects, biology included. http://www.khanacademy.org
A great resource for biology http://www.biology4kids.com/
Exactly what the name says, how stuff works. http://science.howstuffworks.com
A great resource for information regarding evolution & how science works http://evolution.berkeley.edu/
A WONDERFUL website that hits all the main topics of biology: cells, cellular processes (such as DNA replication & protein synthesis), genetics, heredity, & evolution. learn.genetics.utah.edu
This website give information about the evolution of the universe (for this class, we will focus on when the Earth formed, roughly 4.6 billion years ago until the present). http://www.johnkyrk.com/evolution.html
Another website about geologic time http://www.pbs.org/wgbh/evolution/change/deeptime/