学生对 Duke University 提供的 Introduction to Chemistry: Reactions and Ratios 的评价和反馈
课程概述
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DP
Feb 5, 2018
Great Beginner Course. There are some parts where there will be frustration, but the forums are helpful. Any type of class involving math and science involves practice and work. Professor is great!
IC
Jul 10, 2019
Excellent course. Although, it was very challenging to me to complete it and I had to repeat some of the videos, I am very happy that I decided to take it. It helped me to repeat my knowledge.
326 - Introduction to Chemistry: Reactions and Ratios 的 336 个评论（共 336 个）
创建者 Nafiul A
•Jun 16, 2020
I loved this course
创建者 Eb E
•Nov 12, 2019
Cool class!
创建者 Sara b
•Nov 6, 2024
Good work
创建者 Nicholas F
•Sep 18, 2022
good
创建者 PERI S R K
•Jul 26, 2025
Good
创建者 Nancy L
•May 1, 2021
I've found easier tutorials on YouTube for certain subjects but I really enjoyed the demos!
创建者 Moosa K
•Jun 29, 2025
Informative and helpful for beginners as well as highschoolers
创建者 mohammad o t
•Mar 10, 2021
Very long videos
创建者 Armon A
•Jul 25, 2021
The lectures were difficult to follow, and the material on the tests were not covered well.
创建者 rverker
•Feb 2, 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.
创建者 Nicolás C M
•Aug 14, 2020
It say introduction, but it is more advanced that it seems