Teaching ideas shared with my daughter, now a sewing instructor

Here are some tips for you as a teacher.  This is a random listing.
For you as a new teacher you need to know that folks will come in with all different kinds of machines.  Just remember these things that could go wrong if someone doesn't know their machine.
1.  the bobbin may not be in correctly 2. the machine is not threaded correctly 3.  the tension is not set correctly. 4.  the needle is in wrong.
Most machines thread about the same, needle placement could be different.
If folks are buying machines from where you work, they may think that you know how they work.  If the store has a machine in your class room you need to be familiar with it.  They will also think you know about all machines so be prepared to tap dance your way through.  But if you don't know say that, perhaps you could ask if they have the Manuel for the machine or who they bought it from.  A lot of folks will get machines from thrift stores, yard sales, inherited from a family member.  Use the internet to for information.
If you have kids or adults that come in with a machine that is threaded look at it so when it becomes un- threaded you might be able to get them back on track.  If a needle breaks and it will, make sure you have all the parts, that way you know that a piece of it is not in the bobbin area of the machine.  Use the brush to clean after that happens, sometimes you can get the part out  and sometimes the machine is dirty and that's why the needle broke. 
If you teaching newbie kids and you use the paper idea, you can either keep the thread in or take is out.  I usually do it without thread, but they are sewing on my Bernina's and I know how to re-thread.  So you have to decide what works best.  I usually draw about four straight lines on a piece of paper and have them sew on the lines.  This way they can practice raising and lowering the presser foot and learn speed control on the foot pedal. 
Be careful of speed demons.  You want to show kids how to keep their fingers out of the way of the needle when the machine is working.
Well I probably have more thoughts on this but you get the idea.  Just remember for newbies they have no idea of the lingo of sewing or what tools to use or how to use them.

I am very proud of you this is the best job for you. 
LOVE