@3SailAway Hi, I’m a high school senior just snooping around forums lol.
I took three SAT II tests (chemistry, physics, math ii). From my experiences, it is definitely necessary to take AP classes (except for math) before taking the subject tests.
For chemistry, I took the SAT II right after the course and I got an 760/800. The test requires the critical thinking that you build during the course itself. Non-AP chemistry classes will fail to cover such topics and depth. On top of that, you have to study extra topics by yourself, as there are concepts that aren’t taught in
For the physics subject test, I took it without taking a 2nd year AP physics class (although I’m taking one now). I love physics so I found the motivation to truly learn and understand the material throughout summer. I got a 760. That’s a good score, but only because I spent my whole summer learning.
As @evergreen5 stated, AP Physics I isn’t enough to take the SAT II. Physics I only covers mechanics topics and a few drops of electricity and waves. Meanwhile, Physics C: EM covers mechanics, as well as a detailed study of electricity and magnetism, all of which are required on the SAT II.
From my understanding and experience, honors classes are very different from AP classes. They typically teach a wider variety of topics, but the ideas are much shallower. The SAT II is designed in a way that tests your depth of understanding. Lastly, the SAT II isn’t written based off of any course. However, a lot of the topics and depth levels align with an AP curriculum. Even still, the SAT II covers more topics than learned in AP courses. For example, despite taking AP Chemistry, I had to learn additional topics by myself (ex: nuclear physics, experiment history…). Same goes for physics.
As a student with some experience, I personally recommend that you have your daughter take SAT II for courses that she is great at, or already understands (such as foreign languages). If she loves physics, focus on that. However, if she doesn’t, don’t waste your money on the test. It won’t waive any credit, and it will just be a burden that will be hard to overcome, as she likely won’t have the motivation to study it. I know I wouldn’t if I had to take a history or global language subject test. Good luck.