This week’s installment in the Dead Bunny’s Guide to Algebra series just went live. This time, he’s sharing the two rules that govern multiplying and dividing positive and negative numbers.
[youtube=http://www.youtube.com/watch?v=6xKG0E-QwhI]
The main problem with this particular skill is that students catch on to the rules for quickly, and then try to apply them to adding and subtracting positive and negative integers. Unfortunately, this gets them in a lot of trouble because the two are governed by their own rules.
On the production side, this one seems plagued by two problems. The audio track has a tinny sound to it that I’m not sure where it came from. When I was recording and editing it in Audacity, it sounded fine. In fact, I spent far more time cleaning up the audio tracks for this presentation just trying to remove the background sounds. The second seems to come from the compression both Windows Movie Maker and YouTube put it through. This time, it seems to be affecting both the video and the audio instead of just the video. I’ll need to figure out what’s causing that and try to avoid it.
I may take a break after the next video is finished because my computer is finally home from the shop, and I’ll be transferring back to it and then learning how to produce my videos on Ubuntu. (Advice is welcome. Leave a comment, or email me at rebecca[at]rebeccathomasdesigns[dot]com.)


A few lessons later (also known as this morning), I hit the next section of shading lessons. These lessons focus on hatching, lines drawn with various spacing and pressure. The different values of the mountains and the sky are clearer here, but I almost feel that the hatching lines keep the viewer from being pulled in.






