I could not find a Desmos teacher activity exploration for series, so I made my own. Everything is better with Desmos!

This activity works best if students are already familiar with geometric sequences and series. They are really just exploring convergent and divergent. I instruct them to look up the words convergent and divergent in the dictionary. I thought knowing these definitions would help it make sense. I also included a geometric sequence and series link from Math Is Fun at the end.

Desmos Convergent and Divergent Geometric Series Activity.

Enjoy!

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This is terrific. I wish I’d had this 4 weeks ago when I was teaching this topic. Will definitely use it next year. Thanks for sharing.

I do think you should try them with 0.999 in place of 2 on the desmos page you show. perhaps with 0.5 first !!!

Ok! I will. Thank you for the tip!