The last time I taught students about the concept of half-life they actually measured it during the lab session. We had irradiated samples of indium-116, which has a half-life of 54 minutes. The students measured the number of counts on a Geiger counter every minute for 30 minutes, and that was enough to plot, notice the decrease over time, and calculate the approximate half-life. Of course, this is hard when you don't have access to a freshly irradiated short-lived radioisotope.
Maarten Blaauw has some nice animations:http://www.chrono.qub.ac.uk/blaauw/wiggles/
When The popular comment layout is common, so it is easily recognized scanning to post a comment. If the comment section is in a different format, then I am going to spend more time trying to decipher what everything means.online teaching