This app by Riley Lark, et. al. is nice for gathering data or engaging students.  You visit the app at http://activeprompt.herokuapp.com/ and upload an image.  Students visit a link (Symbaloo, anyone?) and place a dot on the image according to your prompt (where will these lines intersect?  Which best represents your solution?  the prompts are limitless!).  Then a teacher link… Read more →