TodayTools

Learn

Start from zero in coding, AI, Thirukkural and Kolam, one small card at a time.

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sdev.in Learn· topics, from the first step to advanced

Interactive course

DSA for coding interviews

Learn data structures and algorithms by playing with them in 3D, one stop at a time.

13 modules, 58 chapters

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Learning paths

All 14 paths

Practice

Tech topics

All topics

Older video lessonsWeb and Python, in Tamil and English. Not updated for a while.

How to learn with guided flashcards

  1. Pick a topic

    Search or tap a category, then open a topic such as HTML, Git or prompt engineering.

  2. Follow the path

    Start from zero, then Core basics, Next steps and Go deeper. Each step is a set of cards from the very first idea to advanced use.

  3. Review a little each day

    Smart review brings back each card just before you would forget it. Use the cheatsheet and tips when you work.

Good to know

  • Ten minutes a day beats an hour once a week; the review queue is sized for that.
  • Turn a card over only after you have said the answer in your head.
  • Save a level to My decks to edit the cards, add your own and print them.
  • Your progress stays on this device; nothing is uploaded.

Questions people ask

Do I need to sign up?

No. Open a topic and start. Progress is kept in this browser on this device.

Is it for complete beginners?

Yes. Every topic starts with the first idea and plain words, then builds up to advanced use.

Can I study on my phone?

Yes. Tap to turn a card over and swipe right or left to sort it. It works offline once a topic has opened.

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