Curated OER
Bead Play
In this balancing a scale activity, 3rd graders observe two different types of wooden beads on three scales to answer each of the three questions. Students draw each bead at 2, 3 and 4 ounces and answer 2 word problems.
Wyzant
Wyzant: Basics of Equations
This tutorial from WyzAnt contains a walk-through of the basics of solving algebraic equations. Examples are given and the tutorial ends with an interactive worksheet that contains an answer key.