The grades in science are based on total points earned in the class. Point values vary based on the type and length of the assignment. The standard grading scale provided in the handbook is followed when assigning a letter grade. As stated in the classroom rules section of this site - See the student handbook for the school policy concerning homework. In addition to this policy - Assignments are expected on their due date. Late assignment can be turned in ONE DAY late for a maximum of 50% of earned points. Assignments later than one day late will earn zero points. No extra credit will be accepted unless all regular assignments have been completed at a minimum of 50% correct.