Learning by units. A student might study California geography which leads to a study of missions and Early California. A trip might be planned to a local mission. Families might cook early California food as part of a Home Economics unit. Unit studies are great for parents who find it fun to overlap activities for the week on a single topic.
Articles:
https://www.time4learning.com/homeschooling-styles/unit-study-approach.html Time4Learning link answers the question: What are unit studies? The link shares homeschool unit studies; a unit study curriculum; and how Time4Learning works with the unit study approach.