How to change into math major

If you already have a bachelor in some other major, but you want to pursue a math master, you may face some difficulty. The master programs expect you have taken at least some "upper level proof class", but many four year university don't accept second bachelor. So I want to share my experience with you, and hopefully it can be helpful. 

First I applied to a city college (aka 2 year college) in US. Most city college do not have much limits so it's relatively easy to apply. I finish all the "lower level" bachelor math courses there, that takes about 2 years. Usually the "lower level" classes are calculus series (three semesters or four quarters), linear algebra and differential equations.You need to decide what classes to take, since the advisor in city college may not know your situation. I recommend to email the master program you want to go to, they can give you most accurate information.

Many graduate math programs also ask for "upper level" bachelor classes, such as Intro to Proof, Real Analysis, and Abstract Algebra, but city colleges do not have those classes. So while you are in city college, I recommend you to attend summer school in four years college. Summer school also known as "open university", meaning you are not a registered students, you will attend class when they have openings. Taking some "upper level" math classes shows the master program your interest and you are able to successfully finish the program, so they are more likely to accept you.

If you missed that opportunity, just like I do, you have another choice: contact the master program you are interested in and ask if you can get a "conditional acceptance". This means you can take those prerequisite classes in their school, and once you finish the prerequisite you can move on to the master program.  Not all programs offer this opportunity, and again, best way is to email the department.

Now I am in a master program and working towards my degree. The most important lesson I learned is to prepare early and be proactive. When you have questions, the most effective method is to reach out to the program you are interested in,  give them a call or send out an email. Don't get upset (I know it's hard), keep trying and see if you have alternative choices. 

Good luck!

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