7 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
Length times width, and keeping perimeter and area apart.
British corbettmaths
Splitting a shape into rectangles, and finding the side lengths that were not given.
British corbettmaths
Why the conversion factor is squared: 1 m² is 10 000 cm², not 100.
British corbettmaths
Half base times perpendicular height, including the obtuse case where the height falls outside.
American mathantics
What volume means, and why it is counted in cubes.
British corbettmaths
The formula applied to examination-style questions.
British corbettmaths
Six faces in three pairs, and using the net so none is missed.
| Section | Video | Channel | Accent | Level |
|---|---|---|---|---|
| 15.1 | Area of a Rectangle | corbettmaths | British | core |
| 15.2 | Area of Compound Shapes | corbettmaths | British | core |
| 15.3 | Converting Metric Units of Area | corbettmaths | British | core |
| 15.4 | Area of a Triangle | corbettmaths | British | core |
| 15.5 | Math Antics - Volume | mathantics | American | core |
| 15.5 | Volume of a cuboid and cube | corbettmaths | British | core |
| 15.6 | Surface Area of a Cuboid | corbettmaths | British | core |