Can I embed an activity on my website?
Not yet. Embedding activities in other sites is planned.
Updated
Meanwhile, sign in with Google, press Share on an activity and post its link: anyone with the link can play, with no account. Before you sign in, activities stay in your browser, so their links only open there.
For quick classroom jobs, try the free tools: spin the wheel, the random name picker, the team maker and the classroom timer.