Education5 min read
Arithmetic Sequences: Constant Difference, Explained
What a constant difference is, how the nth-term rule is derived rather than memorised, and why the sum of an arithmetic sequence is just pairing.
383 articles · page 8 of 16
Education guides, page 8
Articles 169–192 of 383, newest first. The introduction to this reading list, its topic hubs and the guides other articles cite most are on the first page.
Education articles 169–192
- Education6 min read
The Armenian Genocide: What Happened and Why the Word Matters
The documented sequence of 1915-16, the death-toll range museums give, who applies the term genocide and who rejects it, and why the dispute persists.
- Education7 min read
Ashoka and the Rock Edicts: A Ruler Who Left His Own Words
Ashoka is one of the few ancient rulers who left a first-person record in stone. What the edicts say, how they were deciphered, and where legend departs.
- Education6 min read
The Atlantic Slave Trade and the Long Fight to Abolish It
Abolition took decades and did not stop the traffic. What the archives record, what the 1807 Act changed, and how enslaved people forced the question.
- Education6 min read
Attention Span Exercises, and What They Do Not Fix
What attention span actually means, what attention exercises reliably change, what the trials found about transfer, and what to do instead.
- Education5 min read
Saying It Backwards: Why Reversal Costs You Digits
Reversing a sequence adds a second job on top of holding it. Why backward span runs shorter than forward span, and what that gap is actually telling you.
- Education5 min read
The Bantu Migrations: Two Thousand Years of Movement
How linguistics, archaeology and archaeobotany reconstruct the Bantu expansion, what the latest classifications changed, and why the arrows on maps mislead.
- Education6 min read
The Black Death: How a Pandemic Moved and Who It Missed
Where the Black Death began, how plague actually travels, why one death rate cannot describe it, and the 1348-49 pogroms that followed it.
- Education7 min read
Brain Games for Older Adults: An Honest Read on the Evidence
What systematic reviews actually found about computerised brain training in later life, and the four design features that decide whether a drill is usable.
- Education5 min read
Using a Single-Player Brain Game as a Family
How two or three people share a brain game that has no multiplayer: pass-the-device turns, matched difficulty, and the one genuinely shared artefact.
- Education7 min read
Brain Training Apps Compared: What Each One Documents
A capability comparison built only from each publisher's own pages, read 21 September 2026 (ours re-read 2 October) — including where ours is the wrong choice.
- Education5 min read
Brain Training for Adults With Ten Spare Minutes
A ten-minute practice route for adults with no spare time: one timed sprint, one accuracy set, one technique and one memory round, plus the honest limits.
- Education5 min read
Brain Training Myths, Answered One at a Time
Nine claims people repeat about brain games, each answered briefly with what the evidence actually says and what a practice app does and does not do.
- Education5 min read
Browsing the Past by Region, Era and Theme Instead of by Date
A five-thousand-event timeline is unusable in date order. Three practical entry routes — place, era and theme — and which question each one answers.
- Education6 min read
Running a Budget in Your Head: Rounding That Errs the Right Way
Round every price up, never to the nearest. Biased rounding keeps your running total above the real figure, which is the only property a budget needs.
- Education6 min read
Byzantium: How an Empire Lasted a Thousand Years After Rome
Constantinople fell on 29 May 1453, roughly a millennium after the western empire ended. Why the answer depends on where you start counting.
- Education5 min read
Can Practice Raise an IQ Score? Practice Effects, Explained
Repeat a cognitive test and your score goes up. That is a measurement artefact, a real skill gain, or both — and telling them apart is the whole question.
- Education5 min read
Careless Mistakes in Arithmetic Are Not Carelessness
Most so-called careless arithmetic errors are slips, not gaps in method, and the two need opposite fixes. A taxonomy plus a checking routine that takes seconds.
- Education5 min read
Cause and Effect in History: Trigger, Cause and Condition
Triggers, preconditions, contributing causes and consequences are four different things. Here is the working vocabulary, plus a test you can apply to each.
- Education6 min read
What Is Missing? Change Detection and the Blindness Behind It
How change detection tasks work, what change blindness does and does not prove, and why spotting a removed item depends on what you encoded.
- Education6 min read
China's Deadliest Rebellions and the Problem With Their Death Tolls
The huge casualty figures quoted for China's great rebellions come from census registers. Here is what those registers measure, and what they cannot.
- Education6 min read
Chinese Dynasties in Order, and Where the Traditional Dates Come From
The dynastic sequence is easy to find and harder to trust. Here is the order, which parts rest on contemporary evidence, and which rest on later texts.
- Education5 min read
The Chola Empire and South India's Reach Across the Bay of Bengal
The Cholas built temples that still function and sent fleets across the Bay of Bengal. What the inscriptions support, and what historians still argue about.
- Education5 min read
Choosing a Difficulty Level You Will Actually Learn From
A selection rule with a number attached, plus what a difficulty label physically changes in an arithmetic drill and in a memory round.