Area Of A Circle Simplification
Dave steam 10 (the little engine)(29)
11 damn lies we tell our kids (about maths)
Yuctoborian : A math shortcut for squaring numbers that end in 5
Dc32343
Seeder 1
Number crunching tons of examples
Optics
Triangulation (ppt)
How to make maths really boring
V = IR (and all that)
Matrix lesson
Venn style thinking
Weird trig 5
Multiplication using antidigits
A different way to divide
Square roots close range approximation
Divide by eleven
A look at projectile motion
