I am currently a senior at an American university and I intend on going to graduate school after finishing my final year. My current GPA is 3.73, but assuming I get straight A's my last two semesters when I graduate I could have a GPA around 3.85. Furthermore, I am a TA for the introductory analysis course and possibly for the algebra course taught next semester. I am very serious about mathematics and intend to apply to pure math PhD programs. What level of schools could I be accepted to?