Research & analysis
Study a subject and test yourself
Turn lectures, PDFs and notes into explanations, summaries and practice questions.
Best tools for this task
Every pick scored out of 10 on how accurate its output is, how fast it gets you a usable result, and how cheap it is to run. Reorder the list by whichever matters most.
Most accurate
ChatGPT 9.3
Fastest to a result
ChatGPT 9.5
Cheapest to run
Khanmigo 10.0
1. Khanmigo
Tutors step by step instead of handing over the answer.
- Accuracy
- 8.7/10
- Speed
- 8.9/10
- Cost
- 10.0/10
2. ChatGPT
Endless practice questions and marking at any difficulty.
- Accuracy
- 9.3/10
- Speed
- 9.5/10
- Cost
- 6.2/10
3. NotebookLM
Grounded entirely in your own uploads, with an audio overview.
- Accuracy
- 9.2/10
- Speed
- 9.2/10
- Cost
- 6.2/10
How to do it, step by step
- 1
Upload the course material, not the whole internet — grounding beats generality.
- 2
Ask for a one-page summary, then for ten questions that would catch you out.
- 3
Explain the answers out loud; ask for correction where you were vague.
What usually goes wrong
Check your institution's rules on assisted study before submitting anything.