Try Self-Directed Curriculum, Textbooks, and Workbooks.
Many materials for home schoolers, including full curriculum packages and workbooks used for review and enrichment, are designed to be used by the student without a teacher’s supervision. The list includes the Life of Fred math series and Barron’s “The Easy Way” series. You can also structure your own projects for your children to carry out. When my children were older, I gave them long-term social studies projects to work on. They had to choose a topic, research it, draw a timeline and a map, write essays and biographies, and create an artistic work related to their topic.