Hey guys! I got to a CSU and I’m a math major. I can either concentrate in pure math, stats, teaching, or general (aka no concentration). I want to become a teacher, but I also want to go and get a PhD in mathematics. Which concentration should I pick? If I pick the general concentration I can finish my degree up in 2 years but if I choose pure math it’ll take me 3 more years. Thanks for the help! Oh, and as a side note, how necessary is it that I do undergrad research to get accepted into a PhD program? Answers to any or all of my questions is greatly appreciated! 
Your other posts indicate that you are in your first year at CSUMB taking sophomore-level math courses. So even if it takes you 3 more years to graduate, you would be done in 4 years.
To keep your options open, you may want to take all of the courses specified for both the pure math and the teaching concentrations, as listed at https://csumb.edu/math/mathematics-bs?_search=Math%20pathways . Undergraduate research is at the very least highly desired by PhD programs.
You may want to look up the math department web sites of various universities to see what preparation is expected for their PhD programs.
If you definitely want to teach right away but PhD work is something that may happen in the future for you, then do the teaching concentration. You’ll need those classes and to get licensed to teach if you want to teach in public K-12 schools.
If the PhD is a more immediate goal but you’re sort of toying with the idea of teaching…well. Pure math would be the obvious choice if you absolutely want to do a PhD in pure math, but you could also do a PhD in statistics or applied math, in which case general or statistics or pure math can work for you.
Picking the general concentration would give you the flexibility to take whatever classes you wanted to take to round out your education.
Thanks! @ucbalumnus I wrote in 3 years including this year, so I could finish with a total of 3 undergrad years as opposed to 4 undergrad years.
That was great list provided in the link by ucbalumnus. It is the clearest and most straightforward I’ve seen regarding the study of mathematics.
@yaaasssmathslay: In looking into the study of pure mathematics I have found that to earn a terminal degree one must also be proficient in one of two foreign languages, I think they are Latin ,(French?) or German. This may be changing rapidly, but it was something I saw when I first started the journey of looking into undergraduate programs.
French, German, and Russian are the languages that math majors looking at PhD study may want to learn. A reading knowledge of one or more of the languages (i.e. the ability to read a math article written in those languages and understand the math) may be required to complete the PhD.
You can do a web search for “math PhD language requirement” to see what various math departments want to see.
Do any of you guys know how grad school math differs from undergrad?
Here is a description of what PhD study in math entails:
https://math.berkeley.edu/programs/graduate/phd-program