How do we do this?
There is no time limit, no pressure, just work through it. Anything you don't know then leave it.
Which Book?
This is a rough guide - have a look at the contents of each book too as it may be that you can see a particular skill you feel needs more support.
0 - 15 Book One
16 - 25 Book Two
26 - 35 Book Three
36 - 45 Book Four
46 and Over Book Five