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Commercial Educational Sites
 The Teaching Company Autodidact porn. Seriously. Collegelevel courses on just about anything you can think of.
 Tutor.com Where I work! Online tutoring services for high school and 1styear college students.
Free Educational Sites
 iTunes U Awesome collection of free lectures, with more added every day.
 Khan Academy Another source of free lectures, this one welldeveloped and covering a wide range of subjects.
Reference
 Hyperphysics Comprehensive physics review site.
 Paul's Online Math Notes Well organized review of Calculus (I, II, and III), Linear Algebra, and Differential Equations.
 SOS Math Summary of basic Algebra, Trigonometry, and Calculus. Good integral tables.
Tag Archives: Mac
Mac OS X Grapher – A Quick Note on Changing the Range of Theta in Polar Plots
This post is in response to Tommy’s question on the Getting Started post, namely, how to plot a polar spiral (e.g., r = θ) *without* using the default Grapher range of θ = [0, 2π]. It turned out to be … Continue reading
Mac OS X Grapher: Axes, Grids, and Backgrounds
Finally, a post! I’ve made some changes to the blog. First, I’ve added a Donate button to the sidebar; clicking the button takes you to Paypal, where you’re free to contribute to my “Feed the Putterer” fund. I do realize … Continue reading
Mac OS X Grapher: Contour and Vector Plots
Whew! This post just kept getting longer and longer, until finally I decided I needed to bite it off if it was ever going to get posted. Today we will discuss contour and vector plots, together with a few simple … Continue reading
Mac OS X Grapher – Plotting Data and Curve Fitting
“You can’t use Grapher to plot data.” Not true! You can use Grapher to plot data – it’s just a pain in the butt. Nevertheless Grapher can be useful if you want to plot a small data set and/or do some … Continue reading
Mac OS X Grapher – Plotting Points and Adding Extras
Woot! We’re back! Apologies for the radio silence – real life has been kicking me in the teeth. Nothing like tangling with an insurance company to suck the life out of you. To ease back into this blogging thing I … Continue reading
Mac OS X Grapher – Using Parameters
Welcome to part two of my unofficial MacOS X Grapher User’s Guide – Using Parameters. As before, click on any graph to enlarge.
Mac OS X Grapher – Getting Started
Successful puttering in mathematics requires some way of visualizing the equations you are playing with. It’s all very well to slap around some equation using just a pencil and paper, but there’s a lot of information to be gained from … Continue reading