Design the categories. The categories are the areas where students can receive marks. For example, classwork, projects, homework, participation, quizzes, tests and exams all contribute to grade. The categories may be different by subject and age of students.
Determine where the marks will come from in each category according to the curriculum. For example, the quizzes category may contain four quizzes; each making up 25 percent of the quiz category. Where as the project category may only have one project.
Assign weights to the categories. This determines the significance of the different categories. For example: quizzes may count 10 percent of the final grade, exams 25 percent, homework 10 percent, participation 5 percent, project 25 percent and test 25 percent.
Calculate the mark the student got in each category over 100 by the percent it is weighted. For example, if a student received an 80 percent in quizzes, divide 80 over 100 to get .8. Then multiply that number by the percentage weight of the category: .8 times 10 (percent for quizzes) to get 8. Do this for each category.
Total the amounts received from step four to calculate the student's final grade.