Basically, you are using many, many checks for understanding to see how well students comprehend the material—and are then using this feedback to, in real time, make changes to your explanations and practice exercises.
Your job is to make class fun—to make ENGLISH fun. Think of the class you hated in high school. Multiply that hatred by ten. That’s English to many of these students. Many of them grew up hearing extremely negative feedback regarding their language abilities. Let’s change that!