How to Grade Discussions for Online Classes

I am new to teaching online (as of this semester. After this I will be a pro).

I have been looking for ideas/syllabi/helps, etc.

I found an example of grading criteria for discussions on the Chronicle fora:

GRADING PARTICIPATION/DISCUSSION FORUMS

To earn an “A” for participation you must…
 Create posts that raise original, complex ideas about the text(s) and go beyond more obvious, traditional interpretations
 Create posts that use many short quotes and other appropriate details from the text/video(s) to adeptly illustrate these ideas
 Post to EVERY forum and leave no doubt in my mind that you carefully read EVERY assigned textbook chapter and/or viewed all required material
 Log in multiple times per week to engage in active, meaningful dialogue with other students in the Discussion Forums
 Address multiple discussion questions and write a total of at least 600 words in EACH full class discussion unit and 300 words for each serial episode in your small group
 Create posts that contain virtually no errors in spelling or grammar

To earn a “B” for participation you must…
 Create posts that clearly grasp of traditional interpretations of the texts
 Create posts that use many short quotes and other appropriate details from the text/video(s) to adeptly illustrate these ideas
 Post to EVERY forum and leave no doubt in my mind that you carefully read EVERY assigned textbook chapter and/or literary work
 Log in multiple times per week to engage in active, meaningful dialogue with other students in the Discussion Forums
 Address multiple discussion questions and write a total of at least 600 words in EACH full class discussion unit and 300 words for each serial episode in your small group
 Create posts that contain no more than a few errors in spelling or grammar

To earn a “C” for participation you must…
 Create posts that usually demonstrate a grasp of traditional interpretations of the texts
 Create posts that use some short quotes and other appropriate details from the text/video(s) in an attempt to illustrate these ideas
 Post to EVERY forum
 Log in at least once per week to engage in dialogue with other students in the Discussion Forums
 Address multiple discussion questions and write a total of at least 400 words in EACH full class discussion unit and 200 words for each serial episode in your small group
 Create posts without spelling or grammar issues that interfere with meaning

To earn a “D” for participation you may…
 Create posts that occasionally demonstrate a grasp of traditional interpretations of the texts
 Create posts that only sometimes use short quotes and other details from the text/video(s)
 Not post to EVERY forum
 Rarely engage in discussion with other students in the Discussion Forums; log in only once a week or less
 Write fewer than 400 words in each full class discussion unit or fewer than 200 words per serial episode
 Create posts with spelling or grammar issues that begin to interfere with meaning

To earn an “F” for participation you may…
 Create posts that rarely demonstrate a grasp of traditional interpretations of the texts
 Create posts that rarely or never short quotes and other details from the text/video(s)
 Not post to EVERY forum
 Rarely or never engage in discussion with other students in the Discussion Forums; log in only once a week or less
 Not approach a minimum of 400 words in each full class discussion unit or 200 words per serial episode
 Create posts with spelling or grammar issues that seriously interfere with meaning