This is a Smartboard lesson that allows students to figure out the value of different objects based on their relationship to other objects on a balance or a scale. The objects can all be moved around to make it easier for students to figure out each answer. This is a great lesson to include in a beginning algebra unit. I usually give students small white boards to use at their desks while doing this lesson. The problems range from basic to challenging. The preview file has thumbnails for many of the pages in this lesson.