Enrich/Enhance/Explore

National Geographic:

• The Golden Ratio
• Golden Ratio Practice

PBS:

• The Economic Impact of a Changing Middle Class

Illustrative Math:

• Trina's Triangles
• Graphs of Power Functions
• Running Time
• Graphing From Factors III
• Zeroes and Factorization of a Quadratic Polynomial
• Ideal Gas Law

Don Steward:

• Cubics
• Cubic Graphs
• Algebraic Exercises from 1936
• Two Dice and Generalizing
• Sum One
• Hollow Square
• Eudoxus' Ladder
• Shrink These
• Self-Inverse and Periodic Functions
• Half-Life
• Physics in Proportion
• Faster Film Rates
• Cake Slices
• Power Proofs
• Mega Quadratic Equations
• Trees
• Powers of 11
• Polya's Problem
• Quadratic Graph Properties
• Quadratic Matching
• Plotting a Quadratic this one is pretty amazing if you can wrap your head around it
• Rosettes
• Quadratic Growing Rules

AQA Problem Solving Questions(Problem a Day):

• Scroll To Page 9
• Solutions

Numberphile

• Interesting Formula-Euler's Number thanks David B for this one!