Courses
Every course teaches the system behind one subject, from the ground up. A lesson is eight to twelve short steps and about five minutes. It tells you something simple first, in plain words and usually with a picture, and then asks you to try it. Nothing is scored.
3 courses, 39 lessons, across 3 subjects. Every one starts from nothing — no background needed. Free, and no account.
World News
How a story becomes news
Work out why you heard about today's stories, and name the ones you never will.
- 01Someone has to be there
- 02Change, not size
- 03Far away is small
- 04Two hundred stories, twelve slots
- 05The wire moves first
- 06Access is a currency
- 07The clock shapes the story
- 08A number loses its error bars
- 09Two sides is a choice
- 10The headline is the product
- 11The feed decides
- 12Reading the silence
Climate & Energy
How the planet holds its heat
Work out where the extra heat comes from, where it goes, and why swapping the energy behind it is slow.
- 01Sunlight in, heat out
- 02The blanket that lets light through
- 03A bath with the tap open
- 04Old carbon and new carbon
- 05The average moves, the edges jump
- 06Weather is not climate
- 07The ocean is the store
- 08The slow parts keep moving
- 09Four fifths from the ground
- 10The price that leaves out the harm
- 11The grid must balance every second
- 12Built things get cheaper, dug things do not
- 13Electrify, then clean the electricity
- 14The hard third
- 15Taking a climate headline apart
Personal Money
How money loses value
Work out what a sum of money is really worth — this year, in ten, and in forty.
- 01A price is a swap
- 02One number for every price
- 03A speed, not a level
- 04Why the average is not your rate
- 05Small rates, long years
- 06The rate you get and the rate you keep
- 07Pay against prices
- 08Who gains and who pays
- 09Where money comes from
- 10What a rate rise can reach
- 11When it runs away
- 12Taking a money headline apart