Texthelp recently added some new STEM tools to EquatIO I thought you would be interested in hearing about. They have added an interactive Periodic Table and expanded their partnership with Desmos and added a Scientific Calculator. Check out their recent blog about the New Stem Tools.
EquatIO is a tool available to everyone at NMC which focuses on creating math and scientific equations. It has a wide range of equation capabilities and uses Desmos for graphing. You can create accessible content in several ways and students can use it as well to provide their work in response. If you have not taken a look at this tool and would like to know more, please let me know. Either send in a helpdesk ticket or email email@example.com.