If your homeschooler (or someone else in your household) is learning a foreign language, these books are a great resource. I stumbled upon these accidentally, and fell in love with the Spanish version immediately. Yes, I have my son learning the language, but I have also taken a considerable amount myself and love the language. I’m not fluent, but wish I was, so I love any awesome resources I come upon.
These books have tons of vocabulary for lots of different subject areas, complete with articles, and beautiful colorful pictures. A lot of pages also have a chart of related phrases or adjectives to go along with the main topic area. Topic areas include sections such as: