John H. GCSE Maths tutor, A Level Maths tutor, A Level Further Mathem...

John H.

Currently unavailable: until 20/11/2016

Degree: PhD in Metallurgy and Materials ("solubility and particulate release behaviour of corrosion films on SS316L surfaces in simulated PWR primary coolant") (Doctorate) - Birmingham University

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About me

About me:

Hi there. I'm in the final year of a PhD at the University of Birmingham, writing up my thesis. I'm still learning!
I love maths and physics - there's so much cool stuff, especially at A Level. I still remember when I first learned about things like calculus and complex numbers in maths, and crazy stuff like wave-particle duality and fission & fusion in physics. There's also some cool stuff at GCSE, like irrational numbers, which keep on going for eeeeeeeever! Blow's your mind when you think about it...
Hopefully some of my enthisiasm will rub off, as I help you with the concepts and techniques you're struggling with, and help you with exam technique to get the mark you're hoping for.


These 55 minute slots are all about you. You dictate what you want to cover, whether that's some extra explanation on a topic you're particularly struggling with, tips on improving exam technique, or whatever.

let me know your exam board and the topics you'd like to cover beforehand and i can prepare some relevant material, or you could also come to the session with some particular questions (e.g. past papers) you'd like me to go through with you.
I'm patient, and happy to try lots of different ways to explain something if you're really stuck on something. It's always better to try and understand the concepts, then the questions you're being asked make a lot more sense (that's expecially true in physics, where a good understanding means you can sometimes spot a short-cut way of answering the question!) Failing that, there is also the age-old technique of doing lots of questions till you're good at it. Sometimes it is only after doing lots of questions that the penny drops.

next steps:

Don't hesitate to contact me through the website if you have any questions, or book a FREE "meet the tutor" session.
I look forward to meeting you!

Subjects offered

SubjectLevelMy prices
Further Mathematics A Level £20 /hr
Maths A Level £20 /hr
Physics A Level £20 /hr
Maths GCSE £18 /hr
Physics GCSE £18 /hr


Mathematics A-LevelA
Further MathematicsA-LevelA
Theoretical Physics and Applied MathematicsBachelors Degree2:1 hons
Physics and Technology of Nuclear ReactorsMasters DegreeDistinction
Disclosure and Barring Service

CRB/DBS Standard


CRB/DBS Enhanced


General Availability

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Ratings and reviews

5from 4 customer reviews

Mae (Parent) August 6 2016

Oliver (Student) August 3 2016

Mae (Parent) August 1 2016

Mae (Parent) July 26 2016

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Questions John has answered

​What's the difference between the mean, median and mode? Why are there so many different types of average?!

The average we're all familiar with is called the mean average - "add them all together and divide by how many there are", but sometimes another type of average makes more sense. As an example, consider a company with 8 employees, earning the following amounts per week. £200 £220 £250 £280 £...

The average we're all familiar with is called the mean average - "add them all together and divide by how many there are", but sometimes another type of average makes more sense.

As an example, consider a company with 8 employees, earning the following amounts per week.


For the mean average, we add them all together (to give £8000), then divide by how many there are (8 of them), to give £1000 a week - this is the mean average weekly wage of the company, but all but one of the employees earns less than this, the average is skewed (messed up) by the boss who gets way more money than everyone else!

For the median average, we list the amounts in ascending or descending order (conveniently, this has already been done), then select the middle salary. Since there are an even number of employees, there are two values which are both equally in the middle - £280 and £300 - so we take a (mean!) average of those two. The median average is £290 a week.

In this case, the median average (£290/week) gives a better idea of the wages of a typical employee, compared with the mean average (£1000/week).

The mode average is usually used when data are in categories, such as shoe sizes, and is simply the category which occurs most often.

For example, here is a table of shoe sizes and frequencies for a class of 27 year 11 pupils.

Size    |    frequency
 6        |    2
 7        |    3
 8        |    4
 9        |    8
10       |    5
11       |    4
12       |    1

the mode is simply the category which occurs most often, in this case the shoe size 9, with 8 people in the class having that shoe size.

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1 year ago

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