Hello there,
I've come across your description. I can modify your school app. I am glad to tell you that I've 2.5+ years of experience in flutter development & 5 + years of experience in android & ios mobile application.
I've also knowledge in native android(java, kotlin), native ios(Objective C, Swift) & hybrid (React-native, ionic), Cross-platform(Flutter), 3rd party integration, API integration, (MVC, MVVM, MVP) patterns knowledge in android & (MVC, MVP) pattern knowledge in flutter.
Let's come over chat so that we can start it immediately.
Thanks & Regards
Vikas