This video covers:

- Which gases make up our atmos
phere
- Why atmosphere pressure decreases with increasing
altitude
- Why it is difficult to breathe at

high altitude
s

General info:
-
Suitable...

This video covers:

- The idea that radioactive materials contain unstable iso
topes
- What alpha, beta, gamma and neutron ra
diation is
- How ionising and penet

rating they a
re

General info:
-...

This video covers how to calculate the volume of cylinders and prisms. It includes examples of each and a sample exam question.



This video is suitable for maths courses around
the world.
KS3 - All
on your course...

This video explains how to find the coordinates of a point that lies a certain ratio along a line, e.g.

"If A is (3, 4) and B is (-7, 8), and C lies somewhere on the line AB such that AC : CB is 3 : 1, what are the...

This video will look at:

The difference between rational and irrational num
bers.
The 4 main types of rational numbers, which are integers, fraction, terminating decimals and recurring
decimals.
2 examples of irrational...

This video covers:

- How to simplify more complicated ratios inclu
ding:
- Ratios with decimals in e.g.
1.5 : 4.5
- Ratios with mixed units e.
g. 1.6cm : 12mm
- Simplifying to the form 1:n e.g. simplify 3 : 2

0 to...

This video covers:

- How to increase or decrease a number by a given percentage. We cover 2 met
hods:
1) Find the percentage change, and then add or subtract it from th
e original
2) The mu

ltiplier method

This...

This video covers how to simplify algebraic expressions like '5 + 3a - 2 + 2a' by collecting like terms.



This video is suitable for maths courses around
the world.
KS3 - All
on your course
GCSE Foundation
- All on...

This video covers how to simplify algebraic expressions like '2p x 3 x 5p x 2' by multiplying together the numbers and the letters.



This video is suitable for maths courses around
the world.
KS3 - All
on your...

This video covers how to expanding single brackets, with 1 term on the outside, and 2 or more terms on the inside of the bracket.



This is part 1/3 in our series on expanding

brackets.

This video is suitable for...

This video covers how to expand and simplify double brackets, so where we have 2 brackets being multiplied together.



This is part 2/3 in our series on expanding

brackets.

This video is suitable for maths cours
es...

This video covers how to expanding triple brackets, so where we have 3 brackets being multiplied together. Questions will often as you to 'expand and simplify' the expression.



This is part 3/3 in our series on expanding...

This video covers the angle rules when you have a transversal crossing two parallel lines. After covering the basics we run through the alternate angles (z angles), corresponding angles (f angles) and allied angles (c angles)...

This video covers:

- The difference between 'actual yield' and 'theoretical y
ield'
- Why the actual yield may be less than the theoret
ical yield
- How to calculate the pe

rcentage yield


Exam board specific...

This video covers:

- How to use the moles = concentration x volume equ
ation
- A worked example using the above equation and mol

ar ratios

Exam
board specific info:r/>AQA - Higher tier only
IGCSE Edexcel -...

"Avoiding Shifts in Verb Tense" models how to revise inappropriate shifts in verb tense.

Children to spell 3-4 letter UE Digraph words

In this video, students are introduced to the writing process, a step by step guide to help writers tackle this subject. Young writers are encouraged to follow the process and create excellent writing.

This video discusses the purpose of, and techniques for, revising writing.

Revising explores the important elements of the revising step of the writing process.

Garth Nix answers fan questions. In this video, he offers advice on the writing and revising process, explains his approach to diverse representation, and says that his favourite book is always the next one he is planning to write. Garth...

Recent scientific research has shown us the benefits of sleep. And we're increasingly aware that good sleep is crucial to memory and learning. Of course, just getting lots of sleep isn't going to get you good grades. You need to...

In this video, you will learn how to revise your realistic fiction story to improve your writing. We will discuss how to add, change, or remove parts of your story to make it even better!

In this series, you will learn how to write a How-To! If you have chosen a topic, written an introduction, and written steps, you are ready to revise your steps to make them even better. Be sure to add details so the reader knows exactly...