Many schools offering classes in aluminum welding don't offer degrees, but they do offer certification in aluminum welding. Employers looking for qualified welders are going to ask about training and certification, and this is where the welding schools really help, teaching skills and giving a certificate that holds up to scrutiny. The best places to find aluminum certification classes are community colleges, trade schools and technical schools.
Trade schools concentrate on skills that may not require an actual degree or program, but which are complex enough to demand good trading and certification. Aluminum welding falls under this category and welders often remain in high demand even during an economic downturn because they are not easily replaceable. Trade schools offering aluminum-welding classes will know the state and local requirements for certification and help students achieve that level of skill.
Community colleges will often offer trade school and technical school programs in addition to general education classes for students moving on to four-year degree programs. In many states, a community college can offer a wide variety of general welding skills during training, or it's possible that just a single semester long class in aluminum welding will be all that is needed for certification. In this case, community colleges often offer the cheapest option for students looking to become aluminum welders.
Technical schools often offer welding courses, and this includes many "for profit" colleges that are run as corporations. What courses or training is offered normally depends on the state's general requirements for certification and whether it is simply a course or part of a semester-long program. In some states, technical schools serve a similar purpose to community colleges but without the general education courses that would be required for a normal Associate's degree, but in some other states they are specialized, so you will need to check with individual schools before making a choice.