Yes, I will help you to build an application based on opentok-react-native. And, I will also make minor modification on the whiteboard to show the curriculum and (PDF book) and allow the student to point on certain word as well.
I do have demonstrated previous knowledge on working on RTC technologies , Opentok , Mobile app development , Native (Java, Kotlin, Swift, Objective-C), Hybrid (Ionic & React Native), Cross-platform (Xamarin) with 8+ years of experience . And, I will deliver the full open source of the user application and teacher application As well.
So, please let me know your convenient time that works best for you to discuss about the scope of your project.
Warm Regards
Mithu