Sector Matemática
Sector Matematica: Orden De Operacion
This short video tutorial explains the order of operations. [4:46]
Shmoop University
Shmoop: Introduction to Pemdas
This resource provides a short video about the mathematical order of operations or PEMDAS. [2:03]
Loyola University Chicago
Math Flix: Integers: Three Ways to Teach Opposites
This QuickTime movie teaches three different ways to understand opposite integers - positive and negative numbers. As you watch and listen to the teacher and student interact it helps clarify the thinking behind applying this concept.