San Jacinto College offers summer classes in Houston. San Jac offers two summer sessions as well as a mini session that takes place between the end of the spring semester and the beginning of the first summer semester. This is an excellent way for you to complete up to 12 credit hours in as few as 10 weeks. Most students take six hours in the first summer session and six in the second session. When the summer is finished, you'll be that much closer to finishing up your degree and graduating.