2021 JSC Grading System (According to JSC New Syllabus 2021). For your convenience, we've included a GPA Calculation System (GPA Calculation System of JSC) and some examples.JSC Grading System 2021 This system will be used to check your JSC results. So, keep reading this article carefully. You can ask the specifics inquiry if you have any difficulties while reading. All JSC Grading System and Mark Distribution questions will be addressed as soon as possible.