All students are required to have their own demonstration kit.
A demo kit is a bunch of rubber bands, batteries, fuses, corks, caps, paper clips, coins or whatever will do. These are kept in a box or container (tobacco tins and dairy cartons are good).
A demo kit is to be used for all study. It is to be used frequently while coaching, doing checkouts, solo studying, or listening to tapes.
A demo kit adds mass, reality and doingness to the significance.
The pieces of the kit represent the things one is demonstrating. It helps hold concepts and ideas in place.
Thus the idea of an auditor, a pc, and a meter become real with two coins and a paper clip. They can be seen and felt.
Demo kits are for use. They will get you much better results.