Category Archives: learning

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What’s the cost of changing a lightbulb

I went to school with a lot of people that were good at math. Walking home to my apartment one afternoon of my senior year I noticed a for sale sign in front of a house. It was a three family house like almost all of the others in the neighborhood. Very similar, in fact, to the one I was renting an apartment in at that time. When I got home I called the number on the sign just to see how much a house like that cost.

Being good at math myself it was easy to understand that rent from one of the apartments was probably enough to pay the mortgage, leaving one to live in and another to live off. I didn’t buy that house but it wasn’t long before I was on the path to becoming a slum lord in a college neighborhood. Early in my real estate career I didn’t have a lot of disposable income and spent a lot of time shopping in discount stores following the save a buck style of accounting popular with slumlords and accounting departments at companies around the world. A box of six light bulbs for a buck, you bet that was in my cart.

After 15 years and at least 100 tenants I’ve divested myself of all of my residential rental properties and would never consider buying a cheap light bulb again. Why you ask. What’s the cost of changing that cheap light bulb? I can tell you from experience it’s a lot more that the $0.17 I paid for it at the discount store.

The cost of changing a light bulb is the cost of the interruption of dinner with friends and family when you get a phone call from an angry tenant who cannot see to put their key in the lock. They are especially angry because the light has been out for weeks and you haven’t done anything about it. There is no point reminding them that you don’t go visit them every evening and if they don’t tell you they light is out you don’t know.

This interruption that ruins your mental peace is not the only cost though. There is additional cost. There is the cost of the trip to your barn to get a ladder and put it in your truck. There is the cost of the cost of going to the home improvement store to get light bulbs because you can never find the ones you got at the discount store. There is the cost of leaning the ladder against the railing of the stairs to reach the offending non-functioning bulb. And of course, there is the cost of sweeping up the glass from the bulb you dropped from the top of the unstable ladder. Not to mention the cost of putting the ladder away and figuring out where you put the original discount bulbs so you can put away the ones that are left over from this job.

At the peak of my rental management business it was really a sideline business for me as I was spending most of my time traveling and consulting for companies like General Motors and Goodyear not to mention the federal court system. For the type of work I was doing I could bill upwards of $2000 per day. Even if you divide the day into 24 hours that’s still almost $85 per hour ($250 per hour if you manage to work only 8 hours.)

Depending on how you do the math it cost me between $170 and $500 to change a lightbulb during those years. The only comparison shopping I do when looking at light bulbs is to find the ones that last the longest.


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Can we make learning videos instead of teaching videos?

I can’t say I’m part of the ME Generation, and with that said, or rather not said, I can say that when I want to know something, unless I’m standing next to someone I’m pretty sure knows the answer, the first thing I do is Google it.  Then I look for a video (preferred) or a web page that explains it to me.  I’m forty three years old, or as I like to call it thirty-thirteen years old.  My generation literally grew up with computers.  I remember the first PCs.  I remember the launch of Macintosh.  I was there when our rich college friends first got PCs with color monitors and the rest of us reminded them that green is a color too.

Now as an engineering professor at a world renowned university my colleges and I regularly lament the fact that our students don’t do the reading and unless we somehow make it required they are likely to skip class in droves. I can tell you emphatically that that it is not their fault!  If we as faculty cannot engage them we deserve to be talking to an empty room and we are doing them and extremely expensive disservice.

So how do we engage them?  I’ve tried things like:

  • in class quizzes,
  • pre-lecture quizzes based on the reading,
  • post-lecture where the answers were only covered in lecture, not in the reading…
None of those things have really seemed to work for and I think it’s for the same reason that although I read almost continuously in high school, on the bus to school, on the bus back from school sitting in bed at night, sitting in the back of the class room,  I don’t think I ever finished one of the books assigned by my English teachers.

What does seem to work is to interact with them, to have a conversation, to ask questions and pull the answers out of them, to give them ownership of he class and its direction and to act as a guide on a journey of learning.  This can be hard to do as you might imagine with a lecture hall full of introverted engineering students.  I’ve been known to resort to throwing candy to (at) students who participate in my ongoing conversation and I’ve made it a habit of showing at least one YouTube video or clip in each class.  It’s these videos that I think are both part of the solution to the problem of engagement and part of the problem itself.

I’ve been using video as a teaching tool for as long as I’ve been teaching, and when I tell my class that they have to watch “my teaching video” —  of me talking about something — if they want to know — what I want them to learn — about that something; it doesn’t matter if the video is any good, I have a captive audience.  This has lead me to “produce” a few good videos and a lot of less good, even bad, videos.

A bad video is much much worse than a bad lecture.  I know from experience that some students will be embarrassed to fall asleep or even zone out in class but will think nothing of falling asleep in front of YouTube or more likely the’ll click on a more interesting video.
A good video can be much better than a good lecture the students can refer back to it they can share it with others they can help spread that knowledge.  A good video is a learning video not a teaching video.

Look for our new learning videos in May