If you're a math or science teacher who wants to take a deep dive into how to best utilize PhET's interactive simulations in your classroom, you may want to work through PhET's virtual workshops. The workshops include videos recorded at in-person PhET workshops along with practice activities and resource handouts for teachers.
PhET offers a workshop specifically for math teachers who have computers for every student in their classroom. That workshop is roughly five hours long. There is another workshop that provides a comprehensive overview of everything that PhET offers and the ways in which the simulations can be used in your classroom. That workshop is roughly twenty-one hours long.