There are cases when the teacher may not be competent and hence tutoring may assist as a supplement to school.
But the bolded contradicts to what you are asking though.
Absolutely not. Don't be fooled into thinking (maybe through tutoring advertisement of results that tutoring automatically means you get a band 6/E4). But whether you want to go tutoring or not is completely up to you.
A good approach to achieving an E4 is through understanding the material...
https://www.dropbox.com/sh/t9ajabxw1n0u1sw/0cS68f0HSs/Mathematics%20Extension%202/James%20Ruse/Term%204%20%5BComplex%20numbers%5D
Questions are ok.
There might be other's better for practice.
Some other interesting resources (MC...
Sorry, I only provide these to my students too. Oops I accidentally linked my past papers ='( Guess you will need to take them.
http://community.boredofstudies.org/showthread.php?t=290055&highlight=gift
Edit: Sorry I didn't see you wanted modern.