Waves, semicolons and percentages: Three learning tips from top teachers

When learning at home, it’s important that you’re patient and kind to yourself.

Just like at school, you might not get every question right first time, or instantly understand all the concepts and facts. But don’t beat yourself up about it!

To help you get started, over on Instagram we've asked some brilliant teachers to explain three key concepts in English, Maths and Science.

Measuring the waves

Sadly we’re not heading off to the beach right now, but there are plenty of other waves to consider in physics. Microwaves, radio waves and ultra-violet waves, to name just a few.

But how can we measure the speed of a wave?

One way is to use the speed, distance, time triangle. The speed of the wave can be calculated by dividing the distance by the time.

If you don’t have that information though, you can also try multiplying the frequency by the wave length (the distance between two peaks of a wave).

To understand how that calculation works, head over to 38:52 to get a quick lesson from Mr Al-Sammari, or check out this revision guide.

Getting to grips with percentages

Knowing how to calculate a percentage change won’t just help you in your maths lessons, it’s also a useful skill for everyday life.

For example, you can use it to calculate profit or loss in business.

Mr Gibson’s top tip is to forget about the word ‘percentage’ at the start of your calculation and instead focus on what the change is.

What is the difference between the two amounts?

Once you’ve got that figured out, you just need to divide the difference figure by the original amount.

Head to 35:00 to hear Mr Gibson work through an example percentage change for you.

Mr Gibson talks percentages with Bitesize on Instagram.

Colon or semi-colon?

When it comes to punctuation, loads of people come unstuck when it comes to colons and semi-colons, and the difference between them. Which one is for lists again?

Fortunately, Educating Yorkshire’s Mr Burton was on hand to clear things up.

At 16:30, he explains that it’s colons that you should be using at the start of a list. Semi-colons can be used to separate items within a list, as well as to separate two independent clauses in one sentence.

You’ll notice that Mr Burton’s a massive fan of semi-colons!

GCSE Chemistry
GCSE English Language
GCSE Maths