Sometimes having a picture helps so I created a bookshelf worksheet to help the kids who learn better visually organize them in their minds
I also created a set of Books of the Bible cards. The cards are simple but can be used to help kids put the books in order if they learn better by doing. Be sure to print them off on good card stock if you want them to last.
There are also a number of songs I found on YouTube that may help those that are auditory learners. This first one has a nice, easy to remember tune.