Hi! Prof. Teller,
 I made a copy of our M15 presentation webpage
 to : 
  http://mmm.mit.edu/~caiwei/Archives/Academic/6.838/SplnSurf.M15/present.html

 There is also a copy of M5 webpage 
 at :
  http://mmm.mit.edu/~caiwei/Archives/Academic/6.838/ConvHull.M5/present.html

 This is because the athena quota is not a convenient place to store big files.
 
 Best wishes!
Wei