losing streak

The Khan Academy has just got rid of its popular streak metric.  I woke up this morning in a somewhat ratty frame of mind and decided to soo...

I started doing exercises on the Khan Academy about 8 months ago as a way of taking my mind of crazymaking things I can do nothing about.  I...

useful & cool (dulce et utile)

I was playing around on Khan Academy (as one does).  As one does if one is unable to block out the world and write a book because unable to...