At the stage you are at now, you don't have to. Any work experience you have had up to now will take full prime space alongside your both your Masters and your Undergraduate degree. Listing every you have ever achieved will take up valuable room and since you only have two pages to sell yourself well for a job, this will not help you.
What I would do is talk about particular modules you have completed at university, your dissertation, what skills you learnt (such as prioritising tasks, presentations etc.) and bullet point these. It depends on the role you go for but you can swap around what skills you highlight from what you have done in education; basically, tailor your CV.
Just to give an example, I have my degree at the top with my classification, subject etc., then my list of skills and any relevant modules, then for A-Levels I list subject and grade and GCSEs just by how many including English and Maths. This takes up approximately one quarter of a page and so leaves lots of good room to pick skills out of a job description and use them under a skills section and to write relevant work experience and responsibilities.