flip classes, blended learning
getting more material in the course; students do some work before they come to class, they feel more prepared; They do the reading.
They watch the mini-lectures ahead of class. If they are more prepared for class, they will learn more and you will have a better discussion. get them involved and increase their learning.
Oral English focuses on techniclal skills: grammar, pronunciation, vocabulary, accent and things of that nature and conversation.. Public speaking focuses on critical thinking, on your ideas, on the structure of your speech, analyzing your audience, putting the speech together for thats pecific audience, then standing up delivering the speech, not talking casually in conversation, but on a formal kind of stage.