wHAT does MHO mean?

If Writeacher used it in a post, she may have meant "My Humble Opinion."

These sites have other definitions for mho.

http://www.thefreedictionary.com/mho

http://www.urbandictionary.com/define.php?term=mho

oh ok.

MHO stands for "Most Helpful Opinion." It is a term commonly used on platforms such as Quora, Yahoo Answers, and similar question-and-answer websites. When users ask a question, other users can provide their opinions and insights. The person who asked the question can then select the "Most Helpful Opinion," which is the answer they found most useful or informative. This recognition can be given to acknowledge the user who provided the best answer or who had the most knowledge or expertise on the topic.