I would like to know how to present the Past Simple in a high school class. Thank you!
Could you please say what you want to present about the Past Simple? Is it verb conjugation, verb forms (affirmative, negative, etc.), verb functions? Also, how much time do you have for the lesson? Is it only one lesson, or ongoing? All of these things will matter in answering the question, "How do you present the Simple Past to high school students?"
For starters, you can see a page I've written about Simple Past tense verbs at Forming Simple Past Tense Verbs