4 lessons from established maths channels, all taught by native English speakers and all matched to a specific section of Unit 1. Every video ID was verified, so none of these links are broken.
British corbettmaths
Dividing every part by the highest common factor, with the same-units trap included.
British corbettmaths
The add–divide–multiply method, and the check that the shares total back.
British corbettmaths
Working backwards: one share is known, the total is not.
American stretchmathantics
Proportional reasoning in its percentage form — the same idea in different clothes.
| Section | Video | Channel | Accent | Level |
|---|---|---|---|---|
| 12.1 | Ratio: simplifying | corbettmaths | British | core |
| 12.2 | Ratio: sharing the total | corbettmaths | British | core |
| 12.2 | Ratio when given one quantity | corbettmaths | British | core |
| 12.3 | Math Antics - What Percent Is It? | mathantics | American | stretch |