Summer Classes

I'm trying to plan ahead for classes I want to take after the spring semester is over. I see that in the future, I have a bunch of classes for my associate of science. In addition to my prerequisites, which I'm trying to finish quickly, I also have some engineering classes that I plan on taking. I decided that I want to knock some classes off during the summer and wondered how many classes are too many for 10 weeks. Below are some classes I might want to do over the summer, but I just wanted some other opinions on it before I try to set myself up for it. And also, I'm just curious about what the summer classes look like. Are they 2 hour classes or are they more like 4 days? How many classes do you suggest I should take over the summer and what kind?

|| || |Term|Courses| |SU25|ENGR 1201 Mayterm| ||Creative Arts N) 5 (SU I)| ||Lang, PHIL, Culture N?4 (SU II) or SPAN 1411|