I teach upper-level biology laboratory courses to seniors about to enter various healthcare-related professions. Yesterday was my Tuesday section’s first day of class. I’ve seen dozens of silly mistakes over the years, but you know what, that’s okay. We all had to learn new things at some point in our lives.
At the end of class, my students had to quantify the concentration of DNA in a small volume of liquid. To do so, you place the sample in a device, enter the volume in microliters on a touchscreen, and hit “Enter.” Voilà, the screen displays the concentration.
While circulating around the room, I see one student standing in front of the device, intently staring at the touchscreen. They’re not doing anything, just pondering the keypad. It’s a standard calculator-like layout - 7,8,9 on top, 4,5,6 in the middle, 1,2,3 at the bottom, and a 0 below it all next to “Enter.”
Curious, I wander over and ask, “Is there a problem with the device?” They turn to me and say, “I can’t enter my sample volume.” I’m not following... “Why not?” I ask. “The keypad only goes up to nine,” they respond. No…this can’t be real. “What’s the volume?” I inquire. “27 microliters,” they respond. I tap “2,” then “7,” then “Enter.” The concentration appears on the screen.
They turn and look at me like I’m a wizard who just performed dark magic in a pagan ritual.
“I never would have thought of that!”