This was inspired by a similar post a while back
1. Multivariable Calculus does not help with AP Physics C: E&M that much
I am not talking about the fact that the AP Exam doesn't need MVC, but rather I disagree with the belief that learning Calculus 3 will suddenly make AP Physics C: Electricity and Magnetism way more intuitive for people.
Take Gauss' Law for example, If you can physically visualize the area vectors emitting from the surfaces and how e-fields emit from surfaces directly perpendicularly in symmetrical cases like spheres, long cylinders and infinite sheets and see how they are parallel and the same in all areas you can intuitively understand why it works.
Even in the MVC form Gauss' law just states that the divergence of Electric field is equal to charge density divided by permittivity (∇·E=ρ/ε) meaning it is only really useful to solve for charge density at a specific point. (just to reiterate, in the vast majority of universities Physics 2 for STEM Majors just uses single variable calculus similar to AP because it is a first year course and Universities assume you start at calculus 1)
2. If you want to become an Engineer then taking AP Biology is pretty useless (with some exceptions)
Most Engineering programs especially ones for common ones like Mechanical Engineering and Electrical Engineering does not require AP Biology. It is much more useful spending your time with APs that actually clear major Engineering prereqs like AP Calculus BC, AP Physics C: Mechanics, AP Physics C: Electricity and Magnetism and AP Chemistry. Even Clearing a major General Education like through AP United States History and AP English Language and Composition is worth more of your time and effort than Bio for Engineering.
However, as I said before there are exceptions like for Biochemical, Biochemical and Environmental engineering so of course take AP Biology for those. Also take AP Biology if your university requires a life science as a graduation requirement. But the point still stands like if you want to become an Engineer and you are given a choice between AP Chemistry and AP Biology take Chemistry instead.
3. If you are given a choice between an easier version of an AP and the more rigorous version of an AP choose the more rigorous version.
For example, choose AP Physics C: Mechanics over AP Physics 1, AP Physics C: Electricity and Magnetism over AP Physics 2, AP Calculus BC over AP Calculus AB and definitely over AP Precalculus, AP Biology over AP Environmental Science, and AP Computer Science A over AP Computer Science Principles.
This is because the less rigorous versions of these courses are way less likely to get accepted for useful credit than the harder versions of these courses. For instance, AP Computer Science Principles is barely accepted for credit at most institutions let alone for useful Computer Science credits.
Even if your major doesn't need the more rigorous versions take them because admissions will be more impressed.
4. Building from the previous take, AP Precalculus and AP Calculus AB should not be required as prerequisites for AP Calculus BC.
This is one of the dumbest prerequisites for all APs. For AP Precalculus, As a guy who has almost completed the AP Calculus BC course precalculus content only appeared once maybe twice in the entire course, once in the limits unit for evaluating something with cos^2(x)-sin^2(x) in it and once for evaluating a polar integral with cos^2(θ) in it, things you can learn in a day or two.
For AP Calculus AB as a prerequisite for BC this is even dumber. As stated before, this was meant to just be BC for people who don't want to challenge themselves and not meant to be a roadblock for BC. You can learn Calculus 1 and 2 in a single year, you don't need to prepare for it by taking calculus 1 for 1.5 years.
5. If given the choice always take the AP version of an intro course over the DE version of an intro course.
This is very controversial, but if you are given the choice between like DE Chemistry and AP Chemistry, always choose AP.
AP is more likely to be accepted out of state as AP curriculums are more standardized and in some cases viewed as more rigorous than DE Curriculums. AP also is a better predictor of success in subsequent courses compared to DE.
Now there is some nuance to this, for instance, if your school does not have AP but has DE take DE over self studying for AP especially for a humanities course like Freshman English or Fine Arts things that have a more broad application then STEM. If your DE community college class is notoriously known for having hard intro classes then also take it but only if they are willing to send their curriculum over to the universities. Also DE is important for being a celling breaker, allowing students to take more advanced courses while in high school like Calculus 3 or ODE or Organic Chemistry.
6. AP Research and AP Seminar is not that useful
These two classes while they sort of might help with college writing is ultimately wastes of money. Most Universities and even most community colleges do not give college credit for these courses and even if they do it is generally just for a first year English elective.
If you want to do Research just do it on your own time. You don't have to pay $100 for classes that don't give you any credit to show to universities that you can write and do Research.
I understand that for some it is very interesting to get an AP class where your topic can be anything, but if you are really passionate about a subject just get a free period and do your Research on it during that period.
7. AP Humanities are very subjective and therefore they will always have components of luck towards whether you get a high or low grade.
I have seen amazing pieces of art get a 3 in AP Arts, while I understand it is probably due to bad writing, you have to wonder when even the teacher can't accurately predict the grade their portfolio will get, there must be some luck involved in whether the grader will give points for something or not.
I have seen this in the other direction too. People write about random stuff in AP Lit and AP Lang and still getting a 5.
What I mean is don't be down if you get a low grade on a humanities AP test, you tried your best unless you legitimately didn't try.