Government of Alberta
Learn alberta.ca: Math Interactives: Rate/ratio/proportion (Video Interactive)
The use of rate, ratio, and proportion is illustrated in this video about action photography. An additional interactive element allows students to explore equivalent ratios equivalencies through enlarging and reducing images to compare...
Loyola University Chicago
Math Flix: Comparing Equal Fractions
This QuickTime movie provides an opportunity to compare different fractions to see if they are equal. As you watch and listen to the teacher and students interact it helps clarify this concept.
Khan Academy
Khan Academy: Factoring by Grouping
Factoring simple quadratic expressions by grouping.
Loyola University Chicago
Math Flix: Fraction Word Problem
This QuickTime movie provides a fraction word problem that compares different rates of speed as fractions to see if they are equal. As you watch and listen to the teacher and students interact it helps clarify this concept.