Here's a great idea for making food chain stacking cups.
"Leaf veins and texture" by Martyn Franklin -- a beautiful capture of the texture and detail. Veieu el disseny fractal?
Do your students struggle with setting up linear programming problems? Do you? Here's a handy list of steps that will help. http://mathfour.com/?p=10084
Linear Programming: Problem 1
Feasible Set Grapher (Linear Programming): Modifiable Template
Linear Programming: Problem 2
BLOSSOMS - Optimizing Your Diet: What Linear Programming Can Tell You…
Linear Programming Lesson by MATHguide
REVAMPED: Modifiable Feasible Set Grapher (Linear Programming)