Maths at Oxford can either be studied as the three year BA or a four year MMath. This choice is made in the third year.
The first year consists of core courses in pure and applied mathematics (including an introduction to statistics). The core part of the degree is completed in the first term of the second year, and students also have a choice of options from the second year – five long options and three short options are taken – with the third and fourth offering a still wider variety of courses, with some options from outside mathematics. The fourth year will, naturally, be more challenging, when some of the courses offered will be shared with students reading for graduate degrees or require study by means of guided reading.
1st year  
Courses Compulsory first year includes:

AssessmentFirst University examinations: Five compulsory papers 
2nd year  
Courses

AssessmentFinal University examinations, Part A Exam structure under review 
3rd and 4th years  
Courses: Large variety, which may vary from year to year, ranging across:

Assessment3rd year: Final University Examinations, Part B: Four papers or equivalent 4th year: Final University Examinations, Part C: Exam structure under review Classification on Parts A and B. Separate classification on Part C 
In the first two years, you will attend eight to ten lectures a week, with one or two tutorials and one or two classes within your college. In your third and fourth years, when you specialise, you may have fewer lectures, combined with classes.
In your first year, you will also have classes to develop computing skills, using mathematical packages to solve problems related to your studies. Later, there is practical work associated with options in numerical analysis and statistics.