Education9 min read
How Historians Date Events: The Methods Behind the Numbers on a Timeline
Stratigraphy, radiocarbon, tree rings, written records and astronomy — how each dating method works, what it can and cannot establish, and why dates change.
4 articles
Education & Brain Games
History and mental arithmetic, structured so progress is visible.
Covering 2 apps in this category.
- Education9 min read
Mental Math Tricks That Actually Work, and the Conditions Where They Break
Base-100 multiplication, percentage reversal, unit conversion and root estimation — every method worked through, with the case where each one fails.
- Education8 min read
Mental Math Practice: The Methods Worth Drilling, and What Practice Actually Buys You
Mental arithmetic methods with every worked example checked, an honest account of what daily practice does, and a way to drill it in a few minutes.
- Education9 min read
How to Actually Learn Something From a World History Timeline App
What a chronology app teaches well, where its dates get slippery, how to tell documented fact from historians' interpretation, and how to check a claim.