Yes, it has occurred that the teacher has assigned what should be multi-day projects and required her kids to have them in by the next morning. I do feel that the teacher is insane. For example, she arrived home from school at 4 PM. Worked on the new assignment for 2 hours, went to training at 6 PM and returned to working on the same assignment at 8:35 until 3 AM to complete it in on time. According to her, the majority of her classmates were unable to complete the assignment because of the excessive time demands of the assignment.
What subject is this class??? At 8th grade, the only accelerated classes I can recall (maybe my kids school district thing...) are math, science and Spanish that resulted in HS credit. All other so called advanced classes were just 8th grade advance classes. Anything other than that, kids had to goto HS and take those classes at zero-th period.
Also, you now have three pages of advices and opinions from fellow forum-dwellers. Comments ranging from do nothing and suck it up (mine), to talk to the PTA/Principal, to soccer coach about relief. Also change school popped up, along with acknowledgement that 8th grade had the most homework (btw, for my kid, it was in the 4th grade, relatively speaking, that had the most HW) than HS. Thread got onto applying to top 20, and cost of private institutions as a sidebar. And finally, your struggle with your kid may have to drop to rec from ECNL if she pursue those high academic options.
(Will note that most top 20s are well funded and their endowments allows for needs based offsets. Income range can go into over $200k/yr and still have some type of offset, depending on the college. Many for income less than $70K~$80K/yr gets a full ride so there is a scale for you. Also every school has, by federal law, "online calculator" that you can guesstimate what might cost you.)
My last advice on the subject. The thing I value the most as kids are growing up, for their future and into adulthood, is having more options available. Each year, some of the options may go away. What I mean by that is any decision you make today can propagate and change the outcome in the future years. Also each year, there is the student's academic performance. This will definitely change available options, if grades drop and as the trend is formed. So start with end in mind and work backwards to see what it takes to get you there.
Just to be rhetorical, since you sound like someone that thinks thing through, so you probably already have thought this but.... Using your example, not doing AP classes or do the very minimal, is chosen. Lets fast forward and its now time to apply for colleges. Every school I know wants students that challenge themselves and not take the easy way out. The transcript will show that the student has high GPA but really didn't challenge herself because the admissions staff knows what AP/IB/Honors classes are offered in the district or the school. Now they'll look for "why not." If the answer is because she played soccer and is on the national team pool, and she is recruited by the college you're applying, that's one thing. Its a totally another thing if she's just applying. I think you get the point. By not doing AP, you may have eliminated desirable options and have to look for lesser alternatives, in this example. This is the hard part about parenting and thinking it through about what the unintended consequences from earlier decisions made today will have in the future.
Good luck.