I have problems with limiting who may partcipate and the numbers that may.
While a one-on-one approach is okay, a game or two is too limited in scope, and it is much better to have more officials envolved in the process.
I prefer not assigning one mentor and one mentee. Take all those interested in the program and have the process there for as many games as possible.
In Phoenix, Arizona we have an online evaluation process and the frosh/JV officials get evaluated by different varsity officials every JV game they work.
The varsity officials are required to observe at least a half of the JV game, and the sub-varsity officials are required to watch our first half and come in at halftime.
The web site is at
http://www.gpboac.com
They may be able to give you some suggestions.