Does semester 1 plus semester 2 equal your overall grade for the class

Short answer, No.

Explanation:

Quarter 1 + Quarter 2= Semester 1 grade

Quarter 3 + Quarter 4= Semester 2 grade

Semester 1 and Semester 2 grades are totally different things. If you are in High school, or are in advanced track middle school class, than Semester 1 and 2 grades go onto your high school transcript that colleges see.Overall grade just refers to how you are doing in a class at a certain point of time.

Let's look at Edge for a second. Overall grade is "the grade on the work you have submitted. No penalty for any missing or overdue assignments".

Think of this in the way you would for colleges or uni; Semester one is your "first final", Semester two is the "second final". Grades to not carry over from Semester 1 to two. They are completely and utterly unrelated.

I hope this helped, although my explanation may be a little confusing. I hope you understand better.

im not entirely sure what you're asking.