Hello Mlymel44 ,
Ok, I understand what you want to do, basically you want to have multiple rooms from only one account for many teachers. it is true that It is complicated from only one account to have multiple rooms for every co-host, For sure you can have only one room and many people as co-host to start the meeting, but it will be the same meeting room for everybody, correct?
So now I am thinking, it can be one option but not sure it can fit your needs, this is to have your meeting room open by the host or any co-host (and this is will be the main meeting room open), then in Webex meetings you can create some virtual rooms named Breakout sessions on fly or when you are scheduling the meeting. So if every body joins to the main meeting room, People will see all breakout sessions available, as per teacher or class name (you can rename the breakout session). Also you can decide who can join in every breakout session,
To setup this feature, please go to your Webex Enterprise Site then schedule a meeting > Show advanced options (blue link on buttom) > Breakout session > Enabled and click blue link "Preassign breakout sessions" > click on create and automatically.
Once you clicked on create button, you will see another window where you can add people (on left side), and create breakout session (on right side). See the attached pics as reference.
In the 3 dots you can rename the breakout session as you want, and also you can add the breakout sessions as much as you want but not exceeding 100, (that's the limit of breakout sessions). Remember this is a workaround so far, in order to have multiple rooms from one account or a meeting room.
Another tip that I can tell you, if the breakout session (class) is over or one person wants to leave it, people should click the red icon on bottom section (see the attached pic as reference), then they will go to main meeting room and finally the red cross icon to leave the main meeting.
Also here you have a link, where you can find how to create breakout session in Webex meetings:
https://help.webex.com/en-US/article/nft9foq/Webex-Meetings-|-Create-breakout-sessions
I hope you can have more options as per your needs, and also I hope this can help. If does, please rate the post.
Thanks in advance