These are cards inspired by the Montessori 3-part cards. The four phases of matter covered are: solid, liquid, gas and plasma. For each set there are a matching set to print and cut out and a control set that can also be printed. The 3 sets are:- Pictures: for the younger learners, ESL, and/or to encourage questions. - Atomic structure models: to see at the atomic level what is happening in each phase. - Information: A summary of the main ideas to know when starting to study these concepts, as w