Since we are including Primary and Elementary students in our History of earth for kids, the goal was, again, to strike a balance between what's been taught in Primary in the past and what to introduce to a Lower Elementary student. Also, I like to introduce content and materials that are buildable, knowing that some topics will be revisited in the future.u003cbr/u003eu003cbr/u003eThis Montessori Second Great Lesson covers Sensorial, Language, Math, Science, Nature, Geography, History, and Art. There are many different directions you can take with this lesson.