Duncan Koerber
University Professor
4.54 (7917 reviews)
8
active courses
4
removed courses
Dec 2015
first content date
May 2025
last content date
38301
total students
7917
total reviews
4.54
average rating
19
total content length
Courses
Kickstart a Freelance Editor & Proofreader Career on Upwork
6.9K
students
2 hours
content
May 2025
updated
$89.99
How to Find & Correct Writing Errors: The Proofreading Guide
5K
students
1 hour
content
Apr 2025
updated
$59.99
7 Lessons on Writing for Becoming a Standout Writer
18.3K
students
2.5 hours
content
Apr 2025
updated
$94.99
Cover Letter Mastery Writing to Get the Job You Want
1.1K
students
1.5 hours
content
May 2025
updated
$13.99
