The Columbian Exchange

Choose the reading you want. You can switch at any time.

They all teach the same thing. Every level covers what went out of the Americas, what came in, and the two things that only traveled one way. The longer ones say more about why — they are not about being smarter.

Pick the one you can read comfortably. If it feels too hard or too easy, switch. There is a level switcher at the top of every reading.

Every level ends with the same three short videos and the same three questions about them. The videos are captioned, and what the narrator says is written out underneath each one.

Level 0The key ideas, in short sentences, and every item on the note sheet. Each part matches a part of Level 1, so you can move up one part at a time.About 522 wordsLevel 1Every idea Levels 2 and 3 have, in plainer words.About 620 wordsLevel 2The standard version, with more of the story filled in.About 816 wordsLevel 3The long way around, with the reasons behind it and what the tidy version leaves out.About 1,661 words Nivel 0 en españolLas ideas clave del Nivel 0, en español. Las palabras de la clase van en inglés entre paréntesis.