April 2016 – jped Maths

support for school mathematics exams

I have developed a database driven website which shares past papers, markschemes and my own ‘write outs’ for most Edexcel modules in mathematics and further mathematics:

jped Exam Bucket

I use this mostly as a resource for my own teaching; using it I can lay my hands of exam questions and solutions of different types very quickly. My students and pupils find it useful too because it shows how to do exam questions using the techniques taught in class; there is an important difference with mark schemes here.

The UK mathematics exam system is in a state of flux at the moment. I see this is as a great opportunity to review and refresh all my teaching material. I look forward to generating new material to support a revised school exam system.

depression near Greenland – logarithmic spirals in nature

Logarithmic spirals frequently occur in nature. Is this such a manifestation?

The general equation for a logarithmic spiral is as follows.

$r=ae^{b\theta}$

Changing the variables $a$ and $b$ produces spirals of different qualities. The $a$ is really an enlargement scale factor but the $b$ controls how the spiral grows per revolution.

If $b=0.2$ is more representative of an ammonite then $b=0.75$ seems to be our Greenland depression.

Wouldn’t it be nice to take the equations for atmospheric fluid dynamics and show this explicitly. Unfortunately this is beyond the scope of this blog: here we have circular motion on the surface of a rotating sphere in an elliptical orbit … . The way to go with this would be to take the basic baratropic equations and then perform a scale analysis to disregard ‘small’ terms. At this point the pure mathematician get frustrated with approximations and goes into a sulk. We are left with contemplating the beautiful images though…

third century wisdom of Diophantus gives us the essential truth about teaching and learning mathematics

The Google facsimile of the 1621 edition of Diophantus’s Arithmetica lays out, in original Greek and Latin translation, the essentials for success in teaching and learning mathematics. Also included is the translation of the second half by Heath.

When I first studied and learned to love mathematics I was beset by friends and family who stridently claimed that this field of study was closed to them because of some biological, or other, reason. This always seemed to undervalue my own effort in getting off the first page.

Teachers of mathematics cannot be permitted to admit that nature is able to restrict the ability to learn the subject but the oriental wisdom of the student making their way to the master is a precondition for success when things seem difficult; in tales of martial arts the student must somehow prepare themselves to learn.

So,

Mathematics appears rather difficult if one is not familiar with it.
Students need energy, eagerness and enthusiasm.
When such motivation is backed up by good teaching rapid learning results.

In school we struggle because of item 1 and bear our hearts to gain item 2, being so often rebuffed. I suppose that we get paid for 1 and 2 because, when item 3 is achieved the job is it’s own reward.