ClassroomScreen for teachers
ClassroomScreen is an online tool teachers can use for a variety of classroom management and display features including random group assignments, timers, polls, text/slides and more. Teachers can create a free account and sign in using a D-E Google account. Students do not need an account. (In fact, according to the Terms & Conditions students are not allowed to create an account if they are under 18.)
All of the widgets/tools in ClassroomScreens are available using a free teacher account so everything can be tried without even a trial account. If you find it useful, you can get a 14-day free trial (one time) in order to use the Pro features.
Here are some limitations of the Free Version:
Limited to 3 lists/sections of students, which are needed for random group creation and the random student selection tool.
Can't save any screen setups, which requires you to add and arrange widgets every time after closing the browser tab or if you reloaded/refresh the web page.
More differences are here.
Limited School License for Pro features are available
A limited number of Pro licenses are available to teachers through Computer Services if you determine it is useful to you after using the free and trial versions. Create a support request to the Computer Services Help Desk to request a license.