Decide how fast the children need to read their books. Assign the reading, and every day, ask the children to tell you what they read that day. This lets you check up, but it also lets you find out what excites them about the book, and make sure they aren't misunderstanding what they read. While the reading is going on, you can assign other activities. Look through the material in terms of your subject list.
History is covered, of course.
It's fun to build models of things, or to paint pictures. You can learn about clothing by sewing or drawing the fashions. Build diaramas, or make a quilt. There are some good picture books on Civil War quilts too. Choose one southern state and one northern state.