why bother to take the negativism when even positive things I earned here is already a treasure to me.

But you, you are a teacher so it means you will have many things that you can contribute.

And I feel you because I also taught for 4 years before (although college students) and occasionally, I do lectures back in our country for graduating engineering students. Don't worry, my lectures are not regarding electrical matters. It's more on what they expect on project site when they are deployed.