Make strategic use of the Internet. For example, you can use QR codes in PowerPoint presentations for older students with smartphones. A QR code is a gateway to a website on the Internet. For example, it can lead to an article about Einstein's relativity theory if you are teaching that in your physics class. In the middle of your presentation, ask your students to pull out their smartphones and access the QR code. They will be able to read the relevant article on their phones. Do this only if you trust your students enough that they will not stray to other websites.
Use different media to teach students. Since not all students learn the same way, include movies, music, radio clips, guest speakers, discussions or field trips as part of the lesson plan.
Have each student decide what they want their end-of-term project to be. Some students prefer writing, while others enjoy drawing or making movies. Naturally, you should approve each project before the students start making them. The approval should be based on probability of completion, cost and timeline.
Involve the students in your lesson. Ask them questions regarding the material. It can be an analytical question like, "Why do you think that scarlet letter 'A' means adulteress?" It can also be a factual question like, "What is Pavlov's dog?"
Have an equal amount of time between lectures, group work and individual work. Because some students needs to talk through a problem before solving it, group work is a necessary part of their learning process. For others, working alone is beneficial. By switching it up, both types of students learn how to work in groups and how to work alone.