How do you creatively engage large classes in language learning?

A discussion in Teaching English in Indonesia on the SpeakWise Indonesia teacher forum.

We've been thinking about the challenges of managing large classes while ensuring every student is actively engaged in learning English. When faced with curriculum pressures and the potential for L1 interference, it can be tough to find innovative ways to foster participation and enthusiasm in every lesson. We invite you to share your own experiences and strategies—what has worked for you in creating a dynamic classroom environment amidst these challenges?