I am confused by the science CSET options as there are the 2 general foundational subtests I and II plus 4 specific subject tests for subtest III. What can you teach with the foundational credential and for the full science credential do you have to pass all 6 to teach any subject? For instance the foundational credential says you can teach introductory courses. Is that "Science 7" such as 7th grade middle school. Or does that include high school Biology and Chemistry, but just not honors or AP bio or chem? To get the standard Science credential it says to pass subtest III in your area of specialization. If I got this in physics I assume I could teach all levels of physics. But would I also be able to teach Chemistry and Biology? Or would I have to take those subtets as well for subtest III? Thank you for your time.