Course record Geology
Geology 221
Earth Through Time
Southern Illinois University-Carbondale
96 grades3 sections1 professor
Grades: 2024–2026
Flunk Score10/100
Needs work
Grade record
2.73
average GPA across 96 grades
70%
A or B
of 96 grades
24.2%
D, F or withdrew
of 99 enrolled
39.6%
A
38
30.2%
B
29
8.3%
C
8
7.3%
D
7
14.6%
F
14
3.0%
W
3
A–F are shares of 96 letter grades · W is a share of all 99 enrolled
How the averages compare
Against other Geology courses, and against the university
- 2.73Geology 221
- 3.08Geology courses
- 3.28School average
Average GPA · Zoomed GPA scale
Lower averageHigher average
Lower averageHigher average
3 sections · 3 terms · Spring 2024 – Spring 2026
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