A simple path through the IIT Madras BS degree, with the free resources Unknown IITians offers at each step, so you can keep one routine from the Qualifier to the Degree.
Short answer: start with the Qualifier, then Foundation, Diploma and Degree. At each level, use the notes, lectures and previous year papers for your subjects.
Start with the Qualifier subjects: free notes, previous year Qualifier papers on Quiz Space, and a live Qualifier course if you want lectures and doubt-solving.
Foundation subjects such as Mathematics for Data Science, Statistics for Data Science, Computational Thinking, English and Python each have week-wise notes, papers to practise and calculators for grades.
Diploma subjects have notes and papers too. Use the CGPA calculator to plan which subjects to take together.
For Degree-level subjects you can find notes, previous year papers on Quiz Space and the grade tools, so you can keep the same routine through the whole programme.
Qualifier, Foundation, Diploma and Degree, for Data Science and Electronic Systems, with the calculators covering all four branches.
Pick your level, follow the week-wise notes for your subjects, and practise previous year papers on Quiz Space. Each subject also has its own page tying its notes, papers and calculators together.
Unknown IITians is an independent study-resources site and is not affiliated with or endorsed by IIT Madras. Please check official sources for admissions, fees, dates and grading rules, and check any calculator's result against your course's official grading document.