Education6 min read
The Scramble for Africa and the Berlin Conference
The Berlin Conference did not divide Africa with a ruler. What the 1885 General Act actually did, what conquest looked like, and who was doing the fighting.
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All articles, page 28
Articles 649–672 of 990, newest first. To read by subject instead, start from a category or a topic hub on the blog’s front page.
- Education6 min read
Why the Second World War Death Toll Is Given as a Range
Three reputable sources, three different totals. What actually varies: who counts as a casualty, which deaths are counted, and who was able to count at all.
- Education6 min read
When a Sequence Puzzle Has More Than One Right Answer
Why a finite list of numbers never forces a single continuation, the convention that makes sequence puzzles answerable anyway, and how to check yours.
- Education5 min read
Short-Term Memory and Working Memory Are Not the Same
One holds information; the other holds it while you do something to it. What separates the two terms, and a quick test for telling which a task needs.
- Education6 min read
Simplifying a Fraction Quickly: Clear the 2s and 5s First
Reduce in a fixed order — halve, clear the 5s, then use digit sums for 3 and 9 — and you cut the numbers down before the expensive tests start.
- Anime & Creative6 min read
Wilds, Cascades and Expanding Reels: A Plain Glossary of Slot Mechanics
Roaming wilds, cascading symbols, split boards, breakable layers and jackpot meters, defined in plain language and set against what each one does to a paytable.
- Anime & Creative6 min read
Slot Volatility: Why One Machine Pays Small and Often and Another Almost Never
Two machines can return the same average and feel nothing alike. What volatility measures, how regulators calculate it, and what it changes in a coin-only game.
- Anime & Creative6 min read
Social Casino Games vs Real-Money Gambling: What Actually Separates Them
Virtual coins, no cash payout, a Teen rating: how a social casino game differs from real-money gambling in law and on the store, and what to check first.
- Action & Arcade6 min read
Arcade or Hardcore: Choosing Between the Two Space Galaxy Attack Games
Two same-studio space shooters with near-identical names and genuinely different designs. A structured comparison of modes, ships, bosses and upgrades.
- Education5 min read
Spaced Repetition for History: Designing Decks That Stick
How to build history flashcard decks that hold sequence and cause, not just dates, and what the classroom research on spacing and retrieval actually measured.
- Education5 min read
Spatial Reasoning Is Not Number Sense
Spatial ability and mathematics are related but distinct. What spatial reasoning means, how it is measured, and why arithmetic drill is not practice for it.
- Languages5 min read
Spoken Cantonese, Written Cantonese and Standard Written Chinese
Cantonese learners meet three systems, not one: what you say, colloquial Cantonese written down, and Standard Written Chinese read aloud in Cantonese.
- Education7 min read
Squares, Cubes and the Roots You Can Read Straight Off Them
Memorise the squares to 30 and the cubes to 15, then use a last-digit filter and a digital-root check to read exact roots straight back off them.
- Education5 min read
Srivijaya and Majapahit: Maritime Powers of the Indonesian Archipelago
Two great archipelago states, and two very different evidence problems. What is documented about Srivijaya and Majapahit, and what is reconstruction.
- Education6 min read
Strategy for a Timed Reasoning Test: Pacing, Skipping and Guessing
How to budget seconds per question, when to abandon an item, and what a guess is actually worth under different marking schemes — with the arithmetic shown.
- Sports & GM5 min read
Style Fit Over Rating: Building an XI That Works Together
Drafting the highest number at every slot produces a squad that does not function. Why position fit and player profile beat a rating, and how to check an XI.
- Education5 min read
Subtraction Without Borrowing: Slide Both Numbers
Add the same amount to both numbers and the difference does not change, but the borrow disappears. Here is why that is safe, and how to pick what to add.
- Education5 min read
Sumer and the First Cities: What First City Really Means
First city is a definition, not a discovery. The Mesopotamian candidates, the rivals in Anatolia, Peru and the Indus, and the criteria that decide between them.
- Education7 min read
The Swahili Coast City-States and the Indian Ocean Trading World
Kilwa, Lamu and Zanzibar were African-rooted, Indian Ocean-connected towns. What archaeology and ancient DNA now show about how they formed.
- Education6 min read
Syllogisms: All, Some, None and What Follows
Categorical statements come in four forms. The square of opposition, a circle-drawing method that settles validity, and the invalid forms that feel right.
- Education5 min read
Tang and Song China: An Age of Invention, Cities and Commerce
Printing, paper money, examinations and huge cities. What the Tang and Song dynasties actually changed, with the dates and the evidence behind them.
- Sports & GM5 min read
Coaches, Support Staff and What They Actually Change
What the rules let a tennis coach say and when, who else sits in a support team, and why hiring a team is a different decision from earning one's trust.
- Anime & Creative6 min read
Glow, Chalk, Glass, Gradient and Mosaic: What Texture Palettes Do
Texture palettes change a shape's surface, not its hue. What glow, chalk, glass, gradient and mosaic each imply, and how many one page can carry.
- Education7 min read
Umayyad, Abbasid and Fatimid: The Early Caliphates Compared
Three caliphates, three capitals, three ruling families and two rival claims to authority. How to tell Umayyad, Abbasid and Fatimid apart.