Prizes on Academic CVs
As for all CVs, they get less important in time. If you're applying for graduate study straight after undergraduate, they're good to list. Your acheivements at this point are likely to be from academic performance, rather than from independent work. When you've completed the graduate programme, no one will care that you came top in Module X in your second year of undergraduate. If the scholarships and fee reductions were based on academic merit, then list them, bearing the same in mind.