Chemistry 6-9
This material, Part of an Atom from In-Print, is more geared towards beginners. I used it with my first year LE student since the material from Research and Development Montessori was a bit challenging for him. We will eventually get back to it.
Later, we used the labels with the Bohr Board (ETC Montessori) to indicate where the nucleus and orbitals are, where the protons and neutrons go, and where to electrons are distributed.
The vocabulary is age-appropriate. I will use the 3-part cards on The Parts of the Atom from Research and Development to further our learning.
Montessori Second Plane of Development 
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