Advice for teaching older "non-traditional" undergraduate students
In my experience, you will find four things happen to various degrees. One is, non-traditional students are less distracted by issues that we know overwhelm the minds of 18-22 year olds. This means, they can bring more focus to their studies. The second thing is, non-traditional students are less inclined to believe they are entitled to something easy from you with no responsibility from them. This means, they can bring a stronger sense of mutual respect to the class room. The third thing is, non-traditional students have some lag or lack of knowledge in pre-requisite information for the course. This means, you may have to spend time to help them remember the missing background information. Finally, non-traditional students are more involved in higher-level and higher-intensity demands in their lives. This means, they can have less time to study during your course as though that responsibility is supposed to be ingrained in their full-time career path for the coming semester.

You might plan in general how to balance these changes during your course presentation and curriculum development. Then, consider how, because you know these changes are coming, you will make specific changes in such things as the pace of your lecture presentations, the number of or time scales of your assignments, and the options you will offer for off-line tutoring.

Overall, teaching non-traditional students is a different experience that can end up being a far more rewarding one than teaching traditional students.

Best regards, and have fun!