Khan Academy
Khan Academy: Finding Common Denominators
The teacher rewrites 2/8 and 5/6 to have the same denominator.
Khan Academy
Khan Academy: Fraction Word Problem: Spider Eyes
Sal Khan solves a fraction word problem about spider eyes. The fractions have common denominators.
Shmoop University
Shmoop: Adding and Subtracting Mixed Numbers
Short video demonstrating how to work with mixed numbers.