Why can’t you take precalc and then Calc BC?? Does your school not allow it, or do you not want to? Plenty of people at my school take precalc and then AP Calc BC, although it is much easier to take AB, obviously.
It might help a lot to get math placement/credit for BC (Calc I & II) instead of AB (just Calc I), although idk about the policies at those specific colleges. It might change if you’re in engineering too.
I wouldn’t recommend skipping AB personally, going straight to BC skips a ton of calculus fundamentals. And looking at your schedule, it might be a headache to teach yourself all those fundamentals. Unless you study it over the summer, though. That could be an option. Though, I don’t know if your school requires AB in order to take BC.
But most schools teach all of the AB material as part of BC, don’t they? That’s why Calc BC is harder; it’s basically just Calc ABC, so it’s faster-paced with less review than AB.
Then again, it might depend on your high school; for example, my school included a few very basic calc topics, like derivatives, in precalc, so it was completely doable and typical to go from honors precalc (even regular precalc) to Calc BC.
I think it’s worth it to take BC if you can. It’s an advanced class and it’s good preparation, especially for engineering.
I guess it depends on the class/teacher, some expect you to know the A stuff already so they skip right to BC. I think people consider BC the hardest because of the material as opposed to the pace. Apparently many people have trouble with advanced techniques of integration and infinite series, that sorta stuff.
But if OP (do people say OP around here?) thinks he can do it, then I’d encourage him to!
My school only offers Calc AB sadly.
Regarding the Comp Sci vs Stats situation, I think I’m just going to go ahead and do AP Comp Sci Principles junior year… It’s going to be a tough year with four AP’s lol, wish me luck
Thanks so much for the help, and not you guys only, but everyone else as well 
Good luck! I know you can do it.
No. Many teach AB 1st year and BC 2nd year. Without knowing the math pathway at the OP’s school, or the OP’s math ability, it’s dangerous to recommend going from precalc to BC
And the question is therefore moot. 
Good luck.
@JoshPan112 What science courses have you taken thus far? You should have at least one year each of bio/chem/physics if you plan to pursue engineering. Any of these would be a better option than AP Environmental Science, IMO.
For your goals, I would recommend the following:
Jr year: Pre-Calculus and Chem
Sr. year: Calc AB and Physics. Calc-based physics would be ideal but it may not be possible.
As for the rest, I don’t believe that it matters whether you take CS or Statistics first.
UCLA and Cal (indeed nearly all of the UCs) are very tough admits, even more so when applying for engineering. You want the best STEM rigor you can muster.
In addition, just a FYI, UCLA, UCI, UC Berkeley, and UCSD recommend SAT subject tests for admission to engineering and to some STEM majors. For engineering, math 2 (based on math through Pre-Calculus) plus a science subject test relevant to your course of study is suggested. You should select courses that will provide the necessary preparation to take these tests no later than the beginning of your senior year.
Good luck!
@mamaedefamilia
I have completed Honors Bio & Honors Chem so far (AP Bio only offered senior year & AP Chem is not offered). I will be taking Physics at the local college next year since my high school is a middle-college program. I can choose in senior year to also take Calc based physics, I just have to complete the college’s prerequisites for that higher level physics course.
In regards to SAT 2 subject tests, I do plan on taking Math 2 and Chemistry.
Thanks for the help!
Don’t worry as much about what APs to take as to prepare yourself for Engineering.
For engineering you shoudl take Precalc (if possible) Junior year … and AP Calc Senior year.
AP stats is not necessary to take and I would drop it.
AP CSP is good to get some background in CS.
AP ES is not necessary.
I get the feeling you are taking them just to take APs. Don’t do it.
Make sure you take Bio, Chem, Physics and an AP version of Physics or Chemistry for Engineering. I wouldn’t recommend AP Bio for engineering.
I am taking Precalc and AP Stats next year. I dropped AP ES for AP Comp Sci.
In regards to taking an AP for Physics or Chem, thats not possible since I come from a small high school.
Colleges don’t really care whether you take Comp Sci or Stats first. When it comes to UCs, protecting your GPA is very important. Since the comp teacher is known to not give many A’s, I think you are being wise to guard your 4.0 and take Statistics first. Good strategy.
BTW admissions people would be impressed if you teach yourself a computer language like Python, Java or C++ and work on personal projects related to programming.
I was advised to drop APES altogether since it was not aligned with my projected major. I will be taking AP Stats and Comp Sci Principles in the Fall… wish me luck!
Were you advised by someone at your school to drop APES?
@BunnyBlue
I was told to choose between AP Comp Sci or AP Environmental Science - they told me that AP Comp Sci would be more beneficial than APES would. - And yes, somebody at my school advised me to do so.
OK. Good luck!