To enter mid-year exam grades, go to your rankbook, and choose the class you want to enter grades for.

    At the top of the screen choose the dropdown next to task and change from "Quarter" to "Mid-Year Exam"

    Mid-Yearm drop down

    Enter the percent in the percent column, click the drop down in the grade column and select the grade. 

    You MUST hit Save in the top left to finish submitting grades: 
    Now repeat for each class.