Based on the ideas presented by Brett Victor (and harvesting the links from that page):
"An active reader asks questions, considers alternatives, questions assumptions, and even questions the trustworthiness of the author. An active reader tries to generalize specific examples, and devise specific examples for generalities. An active reader doesn't passively sponge up information, but uses the author's argument as a springboard for critical thought and deep understanding."
A bit of theory on how to achieve this is outlined in Up and Down the Ladder of Abstraction
- Back to the Future of Handriting Recognition
- Visualizing Algorithms
- Best of Next Journal
- Best of Distill
- Collective Dynamics of 'Small Worlds' Networks
- Parable of the Polygons
- Best of Communicating with Interactive Articles
- Econ Graphs
- Why Momentum Really Works - Gradient Descent
- The Beginner's Guide to Dimensionality Reduction
- ggplot Flipbook
- Exploring Emergence: Contents - from 1996
- NotebookLM - try it here
- Some coverage Is NotebookLM—Google’s Research Assistant—the Ultimate Tool for Thought? - Podcast