Cover as many official exams / tests (A Level, STEP, IMO, BMO, etc) as possible but acknowledge that solutions for these exist online. Must also add unique problems where this is not the case.
Putnam Questions
CSAT
Trinity Maths Questions
NatSci Interview Questions
Optimise the categorisation structure of this website. It is likely sub optimal currently
Undergraduate Maths (and other subjects) - I studied maths at Oxford and I have a very strong conviction that it would have been much better taught if the whole thing was on a platform like this, organised properly with problem sheets and past exams, instant help if you require, etc.
Think of a better competition and incentive structure. Is competition good? Perhaps not always. Additionally, adding new users as part of the scoring system does not sit well with me in the long term.
Users must have more agency to create topics and categories (i.e. doesn’t need to be me alone who adds stuff).
Putnam questions would be nice, also questions from the CSAT https://csat.io/practice/ and there are some trinity college maths admissions tests that I have that make for great interview preparation materials. I also have a few interview test papers for natural sciences. How could I send these to you?
To get the most out of Clean Slate you’ll need to bring in other Biology brainiacs. I’m not qualified to mark Biology in general but if enough people join there will be a natural community that develops that will be able to.
There’s quite a few old BMO questions already. Would it be good to have both:
i) More recent BMO past paper questions
ii) BMO style questions not linked to a specific year (like the IMO geometry)