PhET is one of my top resource recommendations for math and science teachers. PhET offers more than one hundred online, interactive simulations for teaching concepts in mathematics, physics, chemistry, earth science, and biology. Those simulations can be used on PhET’s website and they can be embedded into your website for your students to use

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.