Learner Reviews & Feedback for Introduction to Chemistry: Reactions and Ratios by Duke University
About the Course
Top reviews
SS
May 18, 2020
Enriched with knowledge .Thank you so much Prof Dorian. I have watched the again and again that you become so familiar . You are one of my favorite mentors . Your work is priceless.
MR
Aug 9, 2019
An exceptional course to revise previous concepts. many a times strengthened my previously vague concepts. The interviews and especially the practical videos were very enlightening.
326 - 340 of 340 Reviews for Introduction to Chemistry: Reactions and Ratios
By Ben D
•Nov 18, 2018
I rather enjoyed it. :-)
By Грязев В В
•Dec 16, 2016
понятный и доступный
By John F
•Jul 1, 2020
a good introduction
By Nafiul A
•Jun 17, 2020
I loved this course
By Eb E
•Nov 13, 2019
Cool class!
By Sara b
•Nov 7, 2024
Good work
By Nicholas F
•Sep 19, 2022
good
By PERI S R K
•Jul 27, 2025
Good
By Nancy L
•May 2, 2021
I've found easier tutorials on YouTube for certain subjects but I really enjoyed the demos!
By Moosa K
•Jun 30, 2025
Informative and helpful for beginners as well as highschoolers
By mohammad o t
•Mar 11, 2021
Very long videos
By Armon A
•Jul 26, 2021
The lectures were difficult to follow, and the material on the tests were not covered well.
By rverker
•Feb 3, 2025
It's really intolerable these MOOCs like this one that don't offer PDF support. The videos skim over the subjects, are messy and don't give enough examples. The trainer scribbles on the slides, making them illegible. The quizzes are all-or-nothing (you retake everything if you don't reach the threshold) and the advanced quizzes are ridiculous and useless. What's more, they're not corrected, so it's hard to understand your mistakes and improve. On the other hand, you can take them 15 million times if you have the patience.
By Nicolás C M
•Aug 15, 2020
It say introduction, but it is more advanced that it seems