Provide enough wait-time for students to reflect when responding to inquiries. Provide emotionally supportive environments in the classroom encouraging reevaluation of conclusions. Prompt reviews of the learning situation, what is known, what is not yet known, and what has been learned.
Polyurethane is a fully reacted polymer in which every molecule bonds with another so it is chemically inert, which keeps it from oxidizing or leaching chemicals, theoretically extending tire life. Tires of the future?
1 Polyurethane, a polymer used in manufacture of hard-plastic objects. 2  Polyester, a category of natural and synthetic polymers. 3  Polystyrene, aromatic polymer made from the aromatic monomer styrene.  Polypropylene, a thermoplastic polymer used in a wide variety of applications.