Interactive ppt and lectures

I love conducting workshops and lectures. I used my techniques to capture audience attention:
1- a critical thinking question
2- an easy question related to their experience
3- an activity ( usually group activity)

I think what is most important is the good use of whatever materials you have. I have noticed that some lecturer prepare too much but use very little and they use them poorly.
It is good to know your audience first and choose the best for them.

I also like powerpoint shows and games, the matter is the I have to book the LRC ( Learning Resource Center)