Professor record CIS

Andrew J. Rettig

Sinclair Community College

37 grades4 sections
Grades: 2023–2025
Flunk Score35/100
Below average
CIS 1107 · INTRO OPERATING SYSTEMSCIS 1107 · all instructors & syllabi

Grade record

CIS 1107 · 4 sections
Average GPA
2.51
INTRO OPERATING SYSTEMS
Across 37 grades in CIS 1107
62%
A or B
of 37 grades
31.6%
D, F or withdrew
of 38 enrolled
43.2%
A
16
18.9%
B
7
8.1%
C
3
5.4%
D
2
24.3%
F
9
2.6%
W
1
A–F are shares of 37 letter grades · W is a share of all 38 enrolled
Against everyone else who teaches CIS 1107
−8% vs. the CIS 1107 average (2.74 across 35 professors)

How the averages compare

Against other CIS classes, and against the university

  • 2.51CIS 1107
  • 2.85CIS courses
  • 2.91School average
Average GPA · Zoomed GPA scale
Lower averageHigher average
4 sections · 3 terms · Fall 2023 – Fall 2025
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