Omg I got another email today from my sons school saying he has incomplete more I can't take many…

Omg I got another email today from my sons school saying he has incomplete more I can't take many more emails this is all new to use he use to do so well in school and keep up with all his school work but not sense he started 8 the grade it's been horrible.... I just don't know what else to do I'm about to pull my hair out and advice would be very much appreciated 😡😡😡😡