All posts by nouyang
research: best practices in online education [WIP]
http://augmentedtrader.wordpress.com/2013/01/12/mooc-teaching-lessons-learned-best-balch-practices/
1 to 2 hour lectures may be better for those driving to work
http://www.scoop.it/t/best-instructional-design-and-technologies
Yet as consummate professionals, all of you have conducted copious research, applying sound methods and appropriate metrics, which demonstrates the many positive academic benefits of high-quality technology-enhanced education for all learners. And your efforts have produced tremendous innovation in both technology development and the learning sciences.
The problem is that, for the most part, we are sharing that research with each other at conferences and in publications created specifically to advance the e-learning field. So without verifiable data to consider, our more traditional colleagues are still making instructional decisions based on personal experience or professional bias, political expediency, or just because everyone else is doing it.
http://www.ccsp.sfu.ca/2013/04/moocs-big-data-and-the-open-web/
To read! many links.
https://mobimooc.wikispaces.com/mLearning+pedagogy+and+learning+theory
http://newsletter.alt.ac.uk/2012/08/mooc-pedagogy-the-challenges-of-developing-for-coursera/
Firstly there is the issue of digital mimicry. The Coursera platform, alongside rival Stanford start-up Udacity and the non-profit venture ‘edX’ from Harvard and MIT, currently hosts courses that are broadly conservative in terms of online educational practices. All of these MOOC platforms appear to justify their status by promoting curricula that are equivalent to campus-based courses, with a strong focus on content delivery and an emphasis on the rigor and formality of their assessment methods. However, some of the most interesting and innovative practices in online education have emerged by challenging these very ideas; loosening institutional control of learning outcomes and assessment criteria, shifting from a focus on content delivery to a foregrounding of process, community and learning networks, and working with more exploratory assessment methods – digital and multimodal assignments, peer assessment and group assignments, for example.
[…]
So we are keen to avoid both the over-celebratory fetishizing of the teacher associated with some MOOCs, and the tendency to see the technology as allowing us to write the teacher out of the equation altogether. We want to explore how a MOOC pedagogy might work with a construction of the teacher that has an immediacy that can succeed at scale.
http://onlineteachingmanifesto.wordpress.com/the-text
The possibility of the ‘online version’ is overstated. The best online courses are born digital.
‘Best practice’ is a totalising term blind to context – there are many ways to get it right.
Vending Machine Update
As per my post on open-manufacturing,
“I’m part of a student-run shop, MITERS, at my university, and we considered stocking things like breadboards and arduinos (and other emergency project materials), but that’s really not in our budget as a club. We sort of have a “if the person who knows where the secret cache and can deal with money” system set up, but I wanted to make a countertop vending machine. Used vending machines on ebay are hundreds of dollars and gigantic (we’re tight on space). I decided that the relative portability/stealibility would be fine at MITERS since everyone that comes in is a student.”
From January 13th 2013:
i “finished” my vending machine prototype from mas.863 all in one go, it took ~a day to find all of my supplies (i swear, i had to think like a squirrel to figure out where i buried all my microcontrollers). by finish i mean only that the dispensing aspect works without being plugged into a computer. lasercut wood, buttons and spring off the internet, servos modded to be continuous rotation, arduino uno, and a wall wart. toward the end you can see some of the issues: i made the spacings large to accommodate larger items but… it doesn’t actually work that way, etc.
Here is a video of it failing:
One thing I did learn is that wall warts _will_ reset your arduino uno continuously if you are trying to draw current from them.
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| a 9V wall adapter: 5V to 23V… |
I ended up adding a giant (1000+ uF) cap to smooth out the huge voltage swing, and that solved my stranger errors. I made a short video on this topic. http://www.youtube.com/watch?v=AHoJZ-IKcRs
“300uF (not shown) may not solve your external power supply issue, but 3300uF will!
In other words, if your arduino sketch runs on usb power but not external power (i.e. crappy wallwart), add a large smoothing cap across the rails and that might fix the issue x.x
Embarrassingly, I had this issue with a side project at my internship last summer and didn’t know how to fix it.”
In progress pics:
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drill out hole to inner diameter
 I actually got some that lit up, but only at 24V or something silly |
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| Yea, even at 9V (I think I had a 9V wall wart) they are just barely lit up. |
The buttons were from my trip to China, but nowadays you can get arcade buttons from places like sparkfun and adafruit.
The vending machine is set to be dismantled. Maybe one day I will build one from scratch.
The status of the money accepting problem, as per my post on open-manufacturing as well:
“I made this prototype (uh… keep in mind this was mostly made over 48 hrs in final project crunch mode, it was a cardboard prototype that looked like this 24 hrs earlier) but my budget was more like $50 than $200, so I got stuck figuring out how to accept payment, because you really can’t mechanically accept bills. (Maybe some sacrifice can be made where I make a bill reader that’s not $$ because it doesn’t have to check for counterfeits. But then I think something this flimsy is a bit sketchy with lots of cash in it. Hmm. I think for our own use probably an RFID reader + student ID would do the trick). It also has so many mechanical issues (but yay learning things from prototypes). “
eric hunting replied:
That laser cut box shape looks like it could be endlessly customizable. For instance, one might make a front panel with engraved graphics and extend its edges beyond the bounds of the box to accommodate any sort of decorations or stick-on sign graphics.
It’s interesting how many vending machines today use those spiral/coil carrier mechanisms. When looking into this I found you could buy these as more-or-less generic modular units made in China that could be used in any cabinet design–though they’re still a bit expensive. So, apparently, there is more of a food chain of standardized parts for larger vending machines today akin to that of general electronics. It seems to me that the popularity of this kind of mechanism may come from its combination of greater reliability and flexibility. Vending machines with these are definitely more ‘solid state’ than those of the past and accommodate a wider variety of items in the same machine, with the ‘tuning’ between product types a matter of software/firmware. Different size item, different spacing in the coil, different number of turns to dispense. I wonder if the pro machines have modules pre-wired for a certain number of turns relative to the product size or if they are programmed by other means. The compromise, of course, is that the machines of the type tend to be rather generic in design because they’re relying on the packaging of the items to attract customers rather than design and graphics on the machine itself. The Japanese recently took a new angle on this, though, with the addition of display windows that double as touch screen displays. So the machine acts rather like a video bill-board when not in use then turns more transparent when you approach it with the window serving as a control panel for choosing items.
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Well, that’s all I have to say about vending machines for a long time. I need to dismantle it sometime this summer and free up my shelf space at MITERS.
Happy summer everyone!