All of the above suggestions are good ones, and I would like to add the following commentary:
From a coach or mentor stand point I can offer some advice. First, make certain that the newly Brother understands the meaning of every phrase of the memory work. In order to do this you the instructor must be able to explain the meaning of every question and response. Do not offer yourself to be an instructor if you do not fully understand the lessons to which you are volunteering to teach, it is a waste of your time and his. Be careful to not concentrate on the speed of the lesson. I would much rather take 6 months, the full term of a year, or even longer to teach a Brother the meaning and beauty of the lessons, than teach them meaningless words and phrases. When the student understands what he is saying and why, the memory ability becomes much, much stronger.
One thing that I have learned to be key during instruction, especially the lessons of the EA... Utilize the Lodge room. Walk the Brother step by step through each part of the lesson. It is amazing what the mind can ingest when visual and physical aides are used. Think of it like this, when we are preparing or practicing to confer a degree, we generally do not do so from the comfort of the sideline during floor school; we actually walk through the degree. It is a major aide to the memory. In the case of "hand signals", yes they are great but worthless to one who can not see them but may be able to "see" if you do it my style.
Lastly, keep the time of your sessions down to approximately 15 to 30 minutes. The mind is limited on the amount of new data that it can ingest at one time, usually 15 minutes tops. It is okay to review for longer periods overall, but limit the new stuff and do it first. For example, 10-15 minutes of new lesson followed by 15 minutes of review (older and new material).
Of course all of this is my own opinion, you can do with it as you wish. Everyone has their own style, keep up the good work!