Mathematics & Education Digest (31 September 2017)

I have been blogging on Steemit every day. Here is a compilation of my articles on education and/or mathematics, in case you have missed any of them.

Calculus
Shifting Goal-posts for the Limit?
The Differentiation Onion Method for Chain Rule – Part 1
The Differentiation Onion Method for Chain Rule – Part 2
The Differentiation Onion Method for Chain Rule – Part 3

Complex Numbers
Coordinate Geometry Triangle "Problem" gets Rotated Away
Euler's Genius makes Complex Numbers easy

Education / Pedagogy
“5 times 3” Controversy – Part 1 | visual & rigorous multiplication
“5 times 3” Controversy – Part 2
“5 times 3” Controversy – Part 3
Flat Earth vs Round Earth ~ Critical Thinking

Singapore Mathematics (Elementary)
Using Various Heuristics to solve a Hard Problem | v. important & useful
An Alternative to Bar-Diagram Models | Bar-Diagrams are good, but ...
Finding the Area of an Unfamiliar Quadrilateral
Calculating Circle Areas with a slant

Secondary School Mathematics
Illustrating integer addition & subtraction
Illustrating Double Negatives with Mr Upside-Down
Reflecting on why Negative times Negative is positive
Algebra - The Swapping Trick for Differences
Algebra - Crossing the Bridge over troubled waters
Algebra - The Escalator Trick -- Part 1
Algebra - The Escalator Trick -- Part 2
Algebra - The Escalator Trick -- Part 3
Algebra - Flipping Fractions
Algebra - Flipping with the Escalator
Flat Earth vs Round Earth | an application of Pythagoras' Theorem

Others
Squaring Off | logic puzzle illustrating "proof by contradiction"
A Weird Summation linked with our Universe’s Existence