# Videos ### New and improved Versatiles: Fun in four easy steps

VersaTiles is an active alternative to practice workbooks. It combines the challenge of a puzzle with standards-aligned skills practice, helping students develop fluency of key concepts and skills. ### Building Number Sense with RekenRods

The RekenRods color-coded system integrates all the best features of rekenreks, number lines, linking cubes, and ten-frames. ### How to Teach Adding with Regrouping Using Base Ten Blocks

Learn how to use Base Ten Blocks to add with regrouping. ### How to Add Integers Using Algeblocks

Learn how to use Algeblocks to make sense of adding integers. ### How to Teach Fractions on a Number Line Using Fraction Tower Cubes

Learn how to represent fractions on a Number Line using Fraction Towers Cubes. ### How to Multiply Integers Using Algeblocks

Learn how to solve multiplication problems by building an area model with algeblocks. ### How to Teach Proportional Relationships Using the XY Coordinate Pegboard

Learn to use the XY Coordinate Pegboard to help students understand a graphical representation of a proportional relationship, and how to look at data and decide whether or not it represents a proportional relationship. ### How to Subtract Integers Using Algeblocks

Learn how to use Algeblocks to make sense of subtracting integers.