Need improvement for education: interactive content on the green screen with presenter in front

Please solve the problem of showing either large, interactive content and a tiny teacher window or no content and a visible teacher / presenter. OBS crashes and is hard for non-tech presenters and teachers to use, so not a solution.
An interactive PPT run by the presenter as the green screen content would improve the long-distance educational experience and the presentation experience, no matter the age of the participants.
Studies show young children learn better in an online environment when they can clearly see the teacher’s face and respond. Engaging content (interactive stories, games, songs, etc.) also greatly improves the experience for students. Right now, it’s either/or.