My Google search for "WWII ration books" took me to the National World War II Museum's website (a great museum to visit in person if you're ever in New Orleans). On the website there is a digital exhibit about ration books. That exhibit is part of a larger section of the National World War II Museum's website. That section is called Research Starters.
Research Starters covers ten topics related to American involvement in World War II. Some of those topics include rationing, D-Day, and the role of women in WWII. The research starters aren't intended to be comprehensive overviews of the topics. Instead, the research starters are designed to launch students into further investigation of the topics. In some cases the research starters will point students to another section or collection on the National World War II Museum's website and in some cases students will have to leave the site to further their investigations.
Applications for Education
When I taught U.S. History I always found visuals like those in the ration books exhibit to be useful not only in helping students understand the topic at hand but also for inspiring some conversation and curiosity. If you teach U.S. History, the Research Starters collection on the National WWII Museum's website is one that I'd keep bookmarked.