Math 133X Web Links

Disclaimer:I do not maintain any of the sites in the links below, nor am I or the University responsible for their content or opinions. I maintain this list only in the hope of providing resources for present and future teachers.

For my list of web sites of interest to math educators, click here.

General links

• Cynthia Lanius's page, lots of interesting (and interactive) stuff
• the mother of all mathematical web link pages, at Yahoo
• Math Reference Tables -- has unit conversions, a fraction to decimal conversion page below, and much more
• "Cool Math", which includes 2 links pages for math-for-teachers courses
• NRICH Online Maths Club (UK), has info and interactive puzzles/games
• Los Alamos National Laboratory Mega-Mathematics has resources on problem-solving, graphing, logic, etc.
• Swarthmore's Math Forum Internet Math Library, with oodles of links
• Peanut software is free Windows software to graph and do other handy math-related things
• learner.org has five online courses for K-8 math teachers called Learning Math each of which has a set of videos (select the course, then click on "Watch the Videos Online" and select the video)

Math 1330 Links

Problem Solving (Unit 1)

• How to Solve It, a summary of P�lya's classic text describing a four-stage approach to mathematical problem-solving based on common-sense questions
• I couldn't find a general list of problem solving techniques anywhere, so I wrote this one.
• Pascal's Triangle
• Peter Winton also has a site on Pascal's triangle, including other places where it pops up.

Operations (Unit 2)

• Clock Arithmetic, at Better Explained or CU-Denver, also an applet with animated calculations

Numeration Systems & Algorithms (Unit 3)

• a video on the history of binary numeration systems from learner.org
• a learner.org video showing middle school students converting from base ten to base five
• learner.org has a video on fractions and decimals in the numeration system of ancient Babylon
• Number Bases explanations from the Ask Dr. Math FAQ
• Counting in base six from "Ask Dr. Math"
• "Alien Arithmetic" (base six), from the x plus y files
• a base four addition applet (virtual base four manipulatives) from learner.org
• A page of links to algebra and arithmetic topics, including a cool "base converter" between bases (item 15 on the page)

Fractions (Unit 4)

• Fraction to decimal Conversion
• Decimal to fraction conversion
• This link, given above for Unit 3, also has a few entries on the relationship between fractions and repeating decimals.
• Why does 0.9999...=1?
• Sierra's Early Fraction Understanding videos

Number Theory (Unit 5)

• an FAQ on primes (includes Mersenne primes)
• Largest known primes
• Win $100,000 by discovering a new Mersenne prime! Check it out.
• The Lockers Problem

Math 1331 Links

• The Geometry Center at the University of Minnesota, includes interactive math
• The geometry page at cut-the-link.com has loads and loads of information, on topics including all sorts of constructions, the Pythagorean Theorem, Pick's and Heron's Formulas, and non-Euclidean geometries.
• Clemson's version of the links page for this very same geometry class
• e-zgeometry.com was recommended by a student
• a learner.org video of young children describing shapes they can feel but not see
• StudyWorks's Interactive Geometry page has a number of Java applets that let you work through problems involving triangles, angles and so forth.
• a list of links to tutorials and web pages on geometry topics for elementary students

Triangles

• This page at Clemson lets you play around with a triangle, through a Java applet that lets you drag vertices around, and it tells you side lengths and angle measures.
• This page, by the same author, talks more generally about drawing triangles.
• Reflection 5: the NCTM standards on pre-K--2 geometry and E-example 4.2

Tessellations (Unit 4)

• Go to the Yahoo site above, then select geometry, then tessellations.
• "Totally Tessellated".
• Tessellation Tutorial.
• a tessellations page from the Cool Math site.
• a list of web sites on tessellations.

Polyhedra (Unit 5)

• Go to the Yahoo site in the general links above, then select geometry, then polyhedra.
• George Hart has a web site with lots of information on polyhedra.
• Jorge Rezende has a site on Puzzles with polyhedra and numbers. In this site one can print copies of polyhedron puzzles (for non-commercial purposes only) and one can read several mathematical articles on the subject.
• Enchanted Learning has a nice page on the regular polyhedra (thanks, Tina and Elise).

Symmetry (Unit 6)

• a page on symmetry from the U. of Arkansas
• David Joyce has a site on the symmetries of the 17 wallpaper patterns.

Rigid Motions in the Plane (Unit 7)

• Melissa Shearer and Hayley Rintel (as best we can tell) made this page introducing rigid motions of the plane.
• a page on rigid motions in the plane from the U. of Arkansas

Non-Euclidean Geometries (Unit 8)

• A page on hyperbolic geometry from Clemson: it describes a flat model of the hyperbolic plane, for those looking for another way to visualize it (also has some links to other pages on the topic).
• cut-the-knot.com's page

Measurement (Unit 9)

• measurement stuff - see Math Reference Tables above
• a learner.org video of students measuring the area of two rectangles directly with two different sizes of square
• Golden Ratio (a.k.a. Phi) page here

Math 1332 Links

• onelook.com can help with some of the definitions in Unit One

Sources of data for projects (Unit 4)

• TEA data for Texas school districts in 2000-2001 or previous years (choose by campus, district or region)
• climate information for the DFW and other areas from the National Weather Service
• The U. S. Census Office is a great source of population data.
• medical data (links) from the Centers for Disease Control
• Try airline or travel websites to gather actual airfare data.

Modeling (Unit 5)

• the Excel spreadsheet for the Gradesheets activity
• the Excel spreadsheet for the National Debt activity
• Historical data from the federal government on the national debt
• NetLogo home page, including downloadable executables, models, and user's guide
• the NetLogo shepherds model (save, and then open from within NetLogo)
• the spreadsheet containing the (fall 2002) data and graph for the Shepherds Problem
• a small PDF file containing Shepherds Problem graphs for the 2000, 2001 and 2002 classes (take a peek and compare)
• 2002 class spreadsheets for Ozone Layer, Immigration, and Population Modeling