Features lessons and activities suitable for Primary (Grades 1-2, ages 6-8), Junior (Grades 3-4, ages 8-10), Intermediate (Grades 5-6, ages 10-12); many intermediate activities are also suitable for Grades 7-8. (See: "Grading Science Teaching to Age Levels" --p. xiv-xv.

Books about Proceedings of the Perthshire Society of Natural Science

Books about Daily Readings in Natural Science; with a series of questions on each lesson

Books about Popular cyclopaedia of natural science (by W.B. Carpenter).

Books about Teaching Science Through Holidays and Seasons