• A visual Pythagoras
  • A solution to the soma cube
  • A solution to the crackerbarrel puzzle
  • Visual problem solving postscripts
  • Koblitz Calculus  1998  edition (html)
  • Koblitz's Calculus I (1997 edition)
  • Koblitz and Wells Calculus 2
  • A solution to the somacube
  • more solutions to the somacube
  • Bruce McLean's Bouncing Ball
  • Mary Zervas's Hypocyloid
  • A movie player
  • Universal Maps on Trees (postscript)Transactions AMS, 1999, A joint paper with J.B. Fugate
  • Open Maps on Knaster Continua (postscript)To appear Fundamenta Mathematica, A joint paper with J.B. Fugate and Shannon Schumann
  • The lattice of Knaster Continua (pdf)   (joint work with J.B. Fugate and Shannon Schumann), presented at the First Conference on Continuum Theory at Puebla, Mexico 6/28-7/1, 2000.
  •  numerical methods worksheets
  •  An interestering quadrilateral problem.