Part of preparing to teach your Adult Bible Study Curriculum is having a backup plan.  This is two fold.  One you need to have a backup plan in case there is anything unexpected in class.  Perhaps you have a PowerPoint.  What if the projector breaks or the computer malfunctions?  If you have a video what if the DVD player breaks?  You need to prepare for the unexpected.  Maybe you have an activity that requires multiple groups and not that many people come to class.  These things are all small and trivial in the grand scheme of things but if you are unprepared they can completely derail a lesson.  It is not that we need these things to be an effective teacher but we need to be prepared for them to not work properly.  The second part of this is you need to have someone else ready to teach at any moment.  You are probably a volunteer and you have many responsibilities in life.  We all have those unexpected moments that throw a kink in our plans.  You need to have someone you trust who you can call at any moment if need be that can teach the Adult Bible Study Curriculum.  Do not assume everything will run smoothly all the time.  Be prepared with a backup plan or two.