Hi Nichole,
Welcome to the education community!
If I would look at which newsletters in the Wikimedia movement are the most successful I would consider as top 3: Signpost, Wikidata newsletter and the
This Month in GLAM (of course I have a bit of a conflict of interest with the last one). I value the learning quarterly, but I would not consider the set-up as that successful and inviting as the newsletters I consider to be in the top 3. So I would not take that newsletter as example.
I indeed think a newsletter helps to move forward our education community. In the newsletter we share our experiences, find inspiration and best practises. The newsletter is already about a theme: education. I do not think it is a good idea to choose to have themes each month. Then I think it does not give room to the experiences, but focuses on something else. It is of course possible to invite people to write about a certain topic, because you know that person has experience in it and it is good to stimulate a more diverse range of topics to be described, but making the newsletter thematic I do not think it is a good idea.
To me the education newsletter does not work that handy, but maybe I have a bias because of the This Month in GLAM newsletter I publish.
I do have years of experience in publishing multiple newsletters, and I am willing to help with the publishing, but I do not want to help when the whole newsletter becomes thematic.
Greetings,
Romaine