Desmos

Totally in love with Desmos' graphing capabilities. Brilliant product. I wish this tool was integrated into my math curriculum when I was a high-school student, it would have made understanding graphical concepts so much engaging and interactive. I love how you can type in any equation and get a resultant graph, while also varying any parameter you like. I can visualise students going beyond their regular curriculum to experiment with math equations and build a much more solid understanding of subjects if this was given into their hands. Would encourage teachers to use this to teach math and physics and recommend students to not take for granted the graphs in their curriculum, but instead experiment and see for themselves.

I found this today by coincidence and am definitely sharing it with my math teacher.