Actors/Actresses to play students and teachers

I'm working on a Proof Of Concept (POC) on new teaching methods. I need some actors and actresses in the age group of 18 to 22 (to play a student) add 35 to 50 (to play a co-teacher). I'm looking for ethnic diversity and the recording place is in the Bay Area (California, San Francisco & San Jose area). The selected person will participate in a video with me where they will be asking me some simple questions in science. Here is an example question "Can you please explain why Galileo is called the Father of Modern Science?" Expected camera time is about 10 mins. With retakes to adjust sound & lighting, overall time is going to be about an hour. I can come down to your house to record. If you prefer, we can do the video recording in a nearby park or a school playground.