The atomic theory of matter tells us that a gas is made up of tiny particles called atoms (or molecules, which are combinations of atoms), which are constantly in motion, smashing into each other and the walls of whatever container they might be in. Here is a highly visual model of this idea.
Erik Erikson was an ego psychologist that patterned his theories after Freud. Erikson strongly felt that culture and society have an effect on the ego and that a struggle or conflict can begin. Erik Erikson designed a model of development that has 5 stages of psychosocial development that extend through childhood.
Stages of behavior change. Transtheoretical Model of Change, a theoretical model of behavior change was originally explained by Prochaska & DiClemente, 1983. The TTM is a model of intentional change. This model focuses on the decision making of the individual. source: http://currentnursing.com/nursing_theory/transtheoretical_model.html
Wow what an amazing idea to teach the history of the atom to students with learning difficulties. Not only the atom but this method of teaching can be applied to any number of teaching topics. I've also incorporated this activity into my Atomic Theory Lesson, link in the article.