Go to the Student Portal, view your class progress report. All assignments that are required and the associated due dates are listed. If it is on the progress report it is required. If it is not on the progress report, it is not a graded item.
Remember: the Student Portal is ALWAYS where you want to check for the most updated, accurate grade information, NOT Apex. CUSD weights all exams, and only the Student Portal reflects this weighting.
Grades are updated hourly on the Student Portal.