I learned that it is important to investigate security for apps. that students have access to, or use in class.

After teaching for 10 years the most important thing I've learned is to remain flexible.  After last year's events that is more relevant than ever.  Digital student privacy and protection is extremely important.  We can't simply think about protecting students through our interactions with them and others, but how we can protect them from outsiders and companies who might try to breach their privacy online.