There are several reasons to use the algebra balance either virtually or in reality. First, as mentioned earlier, it provides a visual representation of the actual equation and why you add or subtract or multiply and divide to both sides. Without the visual, students end up automatically following the rules without understanding the why.
In addition, a visual representation helps make the abstract concept more concrete and algebra has some very abstract concepts so these balance scales really help make them easier for students to see. They also allow students to manipulate the equation so they see what is happening on each side. They can see when something is not correct because the scales are out of balance.
Another thing is that using a balance scale helps students develop a deeper understanding of equations because they see that 2x + 1 balances 5 and they are equal. Often students do not understand that so this way of visualizing the equations allows them to understand equality a bit better. They also connect the idea that the variable represents an unknown and the variable does represent a value that we don't yet know.
The Algebra balance scale also helps a variety of students learn. It provides the hands on activity for those who need a kinesthetic element and also helps with differentiation and scaffolding. Furthermore, having students use an algebraic balance helps improve their problem solving abilities because they have to bread down complex problems into simpler steps while developing strategies to solve each step. This is important because students will face problems in real life that require these same skills.
If you haven't tried them before, do so. Many students actually have fun while learning the algebra. Let me know what you think, I'd love to hear. Have a great day.
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