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A Hop David coloring book of conic sections and celestial mechanics 
A Hop David coloring book of Escher like tessellations 
A Hop David coloring book of various geometrical landscapes. A lot of pages are devoted to space filling polyhedra with an emphasis on octahedra alternating with tetrahedra. There's also some polyhedra studies, logarithmic spirals, fractals (only the first few iterations or they'd be impossible to color!) and some miscellaneous. These coloring books are a good tool for getting kids interested in geometry and math. 
Moiré Patterns
Ellipses & hyperbolas
Parabolas
Eccentricity of Conics
Circles?
Drawings of Numbers
Coefficients of (a+b)^n
ln(2)
pi/4
2/3
(pi^2)/12
Escher
Sphere Spirals
Drawings of Equations
cos(a+b)=cos(a)cos(b)  sin(a)sin(b)
& sin(a+b)=cos(a)sin(b) + cos(b)sin(a)
sin(h)/h approaches 1 as h approaches 0
(a+b)^2
= a^2 + 2ab + b^2 & (ba)^2
= a^2  2ab + b^2
Angles of a
triangle total 180 degrees
Pythagorean Theorem
Areas of plane geometry figures (circle, triangle, parallelogram, rectangle)
Paper Blackhole Models
http://clowder.net/hop/etc./wormhol2.html
Quadpods
Tetrahedral Spaceships
An interesting curve
& now I know it's name
Tiles
The
Table Top Tessellations
17 Wallpaper Groups
Twistohedra
A family of polyhedra
starting with the icosohedron
Making Polyhedra with Soda Straws
Mike Patten's inexpensive and easy method of making polyhedral models
Jacob Goff
Paintings by Jacob Goff
Jacob's My Space Page
Me
A pic of my daughters & I
(taken by William Chow)
My family and the Chow family
email hopspage@tabletoptelephone.com
Hop David
P. O. Box 39, Ajo, Arizona 85321
5203877688
