The thing on SISI is just a general way to try things out and get used to how some things work.
The main issue with SISI is that the mirror is currently old - so your skills will be out of date.
You guys ever jumped into a bubble or had one appear around you or know how to get out, etc..
It is a place that you can see what happens when you get smart-bombed or somebody assigns fighters to you or on you

Some things that should also be covered: scouting out a SS ship, warping at range, tackling, POS activities (refueling, using the corp hanger, ship array) etc - a chance to bring together some of the skills you have and the things you've read about but maybe not attempted yet.
I was thinking more that I and one or two others bubble/camp a gate and your team work out what to do.