I am a fourth-year undergraduate math major. I come from a not-so-big school, where the mathematics department is not funded that well. Recently, a professor asked if I would be interested in becoming a TA for a course being taught next semester (it is pretty unusual for undergraduate students to become TAs at my university.) As it turns out, the position shall be unpaid (simply because the department lacks funding, and does not compensate even some PhD student TAs.)
I shall be applying to graduate schools in the US & Canada this year, and the only reason I considered the TA position is that it could perhaps make me a more competitive applicant to PhD programs. Is that true? I'm sure I'll have opportunities to be a TA later in my life, especially as a graduate student, so I'm not missing out even if I let go of this opportunity.
Besides, I shall be busy with coursework and grad-school applications this semester, and the TA-ship would only add extra work and take away time. I'm not sure if it would be worth the investment of my time to become a TA this semester, just to add to my CV for grad-school applications.