Quikmaps has recently added the ability to “draw” lines on your map between various markers. You can write in the markers, and also write a general description of your map. Then, you’re given an embed code as well as a unique url address. And you don’t even have to register to use it!
There really isn’t a mapmaking site out there that’s easier for anyone, including English Language Learners, to use. The only disadvantage is that it doesn’t appear that you can import images in your marker descriptions.
I’ve placed the link on my website under Student Maps.