Rounding Explanation from LearnZillions
Rounding Step by Step from Study Jams
Math Pup Defense (rounding)
Addition with Regrouping Video from Math Playground - There are also games to practice the skill.
Properties of Addition from Study Jams
Addition with Regrouping from Study Jams
Addition with regrouping Match
Subtraction with Regrouping Video from Math Playground - There are also games to practice the skill.
Subtraction with Regrouping from Study Jams
Cone Crazy - subtraction
Estimating Sums and Differences
Multiplication.com This site has many teaching tips, memory strategies, games, and quizzes.
Introduction to Multiplication video from Math Playground
Multiplication Vocabulary video from Math Playground
Multiplication Introduction from Study Jams
Math Playground - This site has multiplication fact practice and multiplication games.
Math Playground - This site has a video explaining how to tell time. There are also games to play to work on telling time.
Elasped Time video from Math Playground