How period weighting works
The final grade is the weighted combination of grading periods (plus midterm/final periods) via Grading Periods & Final Weights. Multiply each period's grade by its weight, add, and divide by total weight:
Worked example
Q1 88% × 45 + Q2 92% × 45 + Exam 90% × 10 = 39.6 + 41.4 + 9 = 90.0%. A plain average of the three would give 90.0% here too — but only because these weights happen to balance; with different weights the two answers diverge.
Weights are relative
Period weights need not total 100. If your weights are 45, 45, and 10, they total 100 — but 4.5, 4.5, and 1 would give the same result. A weight of 0 excludes a period.
Midterm/final as its own period
Any graded item can be set as a midterm/final, and it becomes its own period in Grading Periods & Final Weights. Aligned with a parent period, it is weighed against that period's sub-periods; aligned with No Grading Period, it is weighed against all periods. It cannot be assigned to a grading period with no sub-periods, or to a sub-period.
Common splits are school choices
One school's setup: quarters at 45, exam at 10. Springfield's: one midterm or final at 10, four quarters at 22.5 each (or midterm and final at 5 each). Both are school configurations, not Schoology rules. The preset buttons above set those splits — confirm your school's before trusting the result.
Common mistakes
- Averaging periods without weights. A plain average is correct only when weights are equal.
- Assuming 45/45/10 is universal. Your school may use different splits, or no exam weight at all.
- Using in-progress grades. Period weighting combines final period grades. A period still in progress will change.
- Forgetting the midterm/final period. A midterm set as its own period has its own weight — it is not part of a quarter's grade.
Course grades: Schoology Grade Calculator. GPA: Schoology GPA Calculator. Full walkthrough: How to Calculate Your Grade in Schoology.