If you don't take summer school at all in my school, the highest math course you can take is pre-calc 12. I want to take calculus, so that means I'll have to take a math course in summer school. Is it true that some universities don't like that? in this case, I have a valid explanation, but what if i want to take social studies 10 over summer school to free up more room for other courses? Would that do more harm than good? I used to think taking more courses was a good thing.
Colleges want to see that you've challenged yourself and taken full advantage of educational opportunities throughout high school. If this sounds like what your summer school is, go for it! I took a chemistry elective last summer and I'm taking a college economics class this summer since economics was not offered at my school. This shows that I am staying invested in my education over the summer and seeking out opportunities. This can demonstrate your investment in your education. They want to know you will keep investing in your education (and by extension, them) when you go to college. Getting into as high a math class as possible is exactly how you would do that, and so is taking classes when you have the option of taking the summer off.
I do think that is a very good idea because colleges will be able to see that in your transcripts you took advantage of the summer opportunities available at your school.
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