Teaching three kids at three different levels can feel like running three separate schools. Unit studies pull everyone back around the same table. Each of these free homeschool unit studies ties reading, writing, science and history to one theme, from animals and nature to history and science topics. Look for printable plans, notebooking pages and hands-on activities you can stretch up or down for each child. Pick one theme, gather a few library books, and let the whole family dig in together for a week or two. More ideas by subject and grade are waiting on our free homeschool printables hub.