Computer Resources 
The resources below come with the following caveats:

Graphs a function with sliders for parameters using Sketchpad. GSP 3.0: anygraph.gsp GSP 4.0: any_graph.gsp  
Transformations of functions  translations and scale changes. transformations.xls [by Nils Ahbel]  
Inverse functions  a visual demonstration of the reflection over y = x. inverse.xls [by Nils Ahbel]  
Parametric equations with Sketchpad. GSP 3.0: parametr.gsp GSP 4.0: parametric.gsp  
Linear Functions  
Exploring with slopeintercept and pointslope forms of a line. linear_equations.xls  
The accompanying worksheet. linear_equations.doc  
Exploring lines, changing slopes and intercepts. GSP 3.0: ymxb0.gsp GSP 4.0: lines.gsp  
Quadratic Functions  
Exploring vertex form of a parabola. parabolas_vertex_form.xls  
The accompanying worksheet. parabolas_vertex_form.doc  
A parabola by folding paper (based on focus and directrix definition). GSP 3.0: parafold.gsp GSP 4.0: paper_folding_conics.gsp Also includes ellipses and hyperbolas. Do you know how to incorporate the foci definition of a hyperbola into this sketch? Let me know.  
Exponential Functions  
Comparing linear growth to exponential growth. linear_vs_exponential.xls  
The accompanying worksheet. linear_vs_exponential.doc 
Exploring Arithmetic Sequences. arithmetic_series.xls [by Nils Ahbel]  
Exploring Geometric Sequences. geometric_series.xls [by Nils Ahbel] 
Archimedes' estimation of circular area by doubling the number of sides of a polygon. circle_area.xls  
All those lovely theorems about chords, tangents, and secants in circles. GSP 3.0: circ_seg.gsp GSP 4.0: circles_and_segments.gsp  
The trisectrix of Hippias, in all its glory. GSP 3.0: trisecx3.gsp GSP 4.0: trisectrix_hippias.gsp 
How long to pay off that credit card? credit_card.xls  
How much will you have to retire on? retire.xls  
What mortgage option is best for you? mortgage_options.xls 
The Law of Sines, visually GSP 3.0: lawsines.gsp GSP 4.0: law_sines.gsp  
Generating a Sine Wave from a Unit Circle: Sketchpad. GSP 3.0: sinwave2.gsp GSP 4.0: sine_wave2.gsp  
Add in the cosine and tangent functions. GSP 3.0: sincosta.gsp GSP 4.0: sine_cosine_tangent.gsp  
Generating a Sine Wave from a Unit Circle: Spreadsheet. circle_trig.xls  
A piano keyboard generating sine waves piano.xls [by Nils Ahbel]  
Four parameters on a sine wave. GSP 3.0: asinbxcd.gsp GSP 4.0: a_sin_bx_c_d.gsp  
Using a sine wave to fit a model to data (the average temperature in Cleveland). trig_modeling_cleveland.xls 
Explore Rsquared by moving data points. Rsquared.xls  
Explore binomial probability. binprob.xls (by Nils Ahbel) 
Fedstats, with data from the Census Bureau and other government agencies.  
The Information Please Almanac online.  
The classic distance calculator: How Far Is It? 
Trace along a graph and watch the tangent line, derivative, and area between the curve and the xaxis. GSP 3.0: derivatv.gsp GSP 4.0: tangent_line_and_area.gsp  
Calculus In Motion (by Audrey Weeks)  lots of Geometer's Sketchpad demonstrations specifically for calculus. 
The Math Forum's fabulous helpers: Ask Dr. Math. Also has a great archive.  
Math Nerds provides "free, discoverybased, mathematical guidance" ... ask them a question, or search the Archive.  
Online solutions to many questions from quite a few textbooks! Pretty cool, no? HotMath.org 
TI Resources (homework help, programs to download, FAQ's, and more resources) 
William Wu's Riddles Page  truly awesome mindbenders.  
The Math Forum's Problem of the Week  
The USA Mathematics Talent Search  for some really challenging questions!  
But we still don't know everything ... visit some Famous Unsolved Problems!  
A wildlife population model. Change the fecundity rate and watch a stable population bifurcate until you have chaos. population.xls [inspired by David Dimsey]  
The Candy Problem  
A Java Applet with a nice simple description and a great interface, from CuttheKnot.org  
A short article by Ivars Peterson  
A spreadsheet for five players  LOTS of different views. candy.xls  
The Birthday Problem  
A spreadsheet simulation. How many people until the first match? birthday.xls  
The Buffon Needle Problem  
A spreadsheet simulation. Watch the needles fall onto the hardwood floor! buffon.xls [works better in Office 2000]  
Fractals  
The Mandelbrot set on the Geometer's Sketchpad, featuring the first ten orbits of a random walk. Takes a few minutes to generate a useful picture; a few hours to fill most of the screen. mandelbrot.gsp [the image at the top left of this page]  
The Mandelbrot set on a spreadsheet, believe it or not. mandel.xls [uses recursive cell references; by Nils Ahbel] 
The undisputed source: MacTutor History of Mathematics 
Math in the Movies from Sneakers to A Beautiful Mind. 
Nils Ahbel's math courses, through ahbel.com. Spreadsheets, presentations, data sets, and lots, lots more.  
Eric Weisstein's World Of Mathematics is a boundless encyclopedia of mathematical concepts, including many interactive explanations.  
101 project ideas for Geometer's Sketchpad  
A great source for interactive exploration of fun topics through Java: Cut The Knot.  
More interactive exploration through Java, focusing on the high school curriculum: Experiment and Explore Mathematics.  
A huge catalog of mathematics related news, books and web resources: Paul Cabay's Mathematics Directory. 
If you know of or find any interesting or entertaining mathematics sites or resources, please let me know!
Email: mbuescher@hb.edu