Each row begins with the number 1 at the left. Skip counting by 2, 3, 4, 5, and so on gives the rest of each row. The diagram can be continued as far as desired. Adding the numbers in each L-shaped region forms a well known mathematical sequence; what pattern shows up? Another mathematical pattern is formed by [...]
Video is now available of David Gross’s colloquium this past week at NYU, which had the title Quantum Field Theory: Past, Present and Future. It’s quite interesting to compare his current point of view to that of ten years ago. … Continue reading →
Effective feedback continues to be a preoccupation of this blog. Here are some posts from other teachers who are thinking hard about feedback and related issues.Do you just sit down with a stack of papers and a red pen and let loose? Mary Dooms suggests that a certain amount of planning needs to precede the actual writing of feedback. She recommends looking through the entire class set of work before committing pen to paper. (link)John Burk gave a student some detailed written feedback, and on
Es liegt in der Natur einer Messung, dass sie nicht beliebig genau sein kann. Und selbst bei einer genauen Messung wird man Schwankungen des Meßwertes feststellen und häufig lassen sich solche Schwankungen sogar statistisch beschreiben. Als etwa 2002 der große Wissenschaftsskandal in der Festkörperphysik aufflog, da war man unter anderem deswegen stutzig geworden, weil die…
A little over a year ago, I teased Grey Matters readers with a mystery skill. First, they had to learn to easily multiply by 63, then learn how to easily multiply by 72. The skill itself was revealed to be how to roughly convert any whole number of years into seconds!
In this post, you'll learn a similar skill: how to convert weeks into minutes instantly!
Back in the days before computers and