A website in html, php, mysql to manage schools, classes and students

The project is to create a website using HTML and PHP (with basic graphics) to manage various schools. Each school must have access to a control panel where to manage classes, professors, and students and their data Every teacher should be able to score on the school calendar marking the absence and presence of the students, notes, and events such as tests and experiments. It must also be able to add different votes to the students. Each student will be able to see their votes, your notes, files shared by its class, its actions marked by teachers in the class calendar, notes or as absences. Everything must be managed by a single mysql database and the site should have a file lungua to be translated into multiple languages. Please find attached a pdf file with information about the structure and data of the project. Sorry for the bad English, if you do not understand something please contact me :) Proposals under $ 150 will be taken into account more easily