This is a series of 10 photocopiable booklets for teachers that cover many aspects of technology education. The folios contain a wealth of information for the elementary classroom focusing on the “Jinks construction systems” pioneered by David Jinks. Each folio is based on his successful professional development courses for teachers. These are the definitive books to help all teachers in the field. Folio 8 - Mechanisms 3: Levers, Hinges, Fluids