My top five favorite instructional strategies he mentioned are as follows:
1) QR codes
2) Solve a Mystery
3) Virtual bulletin board (Padlet)
4) Survey
5) using Google
Some of the strategies are things I already use, so it wasn't always new information to me. Also, since I teach lower level students in middle school, some of the ideas were more developmentally appropriate for high school, which is the level the author teaches. Finally, not all ideas could be easily adapted to math, but I can also be creative and try to figure them out for my students. As with any professional development related to education, you've always got to adapt it to what best meets your kids' needs.