# One is one... or is it?

- Institution: TED
- Department: TED-Ed
- Speaker: Christopher Danielson
- Year: 2012
- Level: For everyone
- Language: English
- Subjects: Mathematics, Teaching and learning
- Source: [TED](https://www.ted.com/talks/christopher_danielson_one_is_one_or_is_it)
- Licence: [CC BY-NC-ND 4.0](https://creativecommons.org/licenses/by-nc-nd/4.0/) (Non-commercial use only, and no changed versions.)
- Who can watch: Tweens profiles and older (sources give no ratings; placed by Invisible Network from the source's own words)

One bag of apples, one apple, one slice of apple-- which of these is one unit? Explore the basic unit of math (explained by a trip to the grocery store!) and discover the many meanings of one. \[Directed by Biljana Labovic, narrated by Christopher Danielson\].

## Lectures

1. [One is one... or is it?](https://invisiblenetwork.ai/learn/ted/christopher_danielson_one_is_one_or_is_it/48e4dc1f0a9e), 4 min (TED's player)