Moodle in English

Hello All,

I am wondering about slimming down moodle for a targetted use on the iPad.

I have an 11 year old son, with autism, who I'd like to use the iPad for acidemics.  I would like a very clean and quick system where quizs could be created via web form and then served to the iPad.
How hard is it to trim down the moodle interface?

Any thoughts?

Thanks so much for your time,

Tim