Have you ever tried to add or subtract fractions that have different denominators? It’s tricky, right? Join Ms. Susanna Post in this lesson to learn how to solve these types of challenging problems!

This lesson uses models to convert mixed numbers to improper fractions. This lesson uses models to convert mixed numbers to improper fractions.

Some say the new Common Core math standards are too easy. Others say they're too hard or too focused on ideas rather than correct answers. Whatever they are, they're in full effect in California ...