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Students know that opposites equal 0.
Adding and subtracting the same number to another number equals 0.

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Allows students to use fact knowledge and fundamentals that they can build upon.  It can help build their confidence that way.  

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Allows students to use fact knowledge and fundamentals that they can build upon.  It can help build their confidence that way.  

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Students in younger grades come with the knowledge of filling in the missing number so we need to take that and connect to the variable.

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Add a number and its opposite equals zero.

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This lesson is preparing students to solve equations. 

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This lesson is preparing students to solve equations. 

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They should already be familiar with tape diagrams. They used easy operations to familiarize them with the variables

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They should already be familiar with tape diagrams. They used easy operations to familiarize them with the variables

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basic algebraic equation and the knowledge that the variables can be different numbers (expire)

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basic algebraic equation and the knowledge that the variables can be different numbers (expire)

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The understanding that the variable can mean any amount and students see it cross curricular

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They know variables represent an unknown. 

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They know variables represent an unknown. 

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It's an introduction to algebraic equations

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It's an introduction to algebraic equations

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Using letters that represent numbers/different numbers.

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Using letters that represent numbers/different numbers.

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This lesson teaches them the inverse operation.

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Understanding identities so  that students can be prepared to solve equations

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Understanding identities so  that students can be prepared to solve equations

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Students learn that adding and subtracting the same number equals the original number. Building their knowledge on identity. 

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Students learn that adding and subtracting the same number equals the original number. Building their knowledge on identity. 

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Students get confused when replacing numbers with letters and once they find the amount for the variable they may think that is the value

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-using letters in Math
-Students get confused about when to use what operation because they haven't mastered opposites.

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solving equations with unknown numbers and variables with the four operations. 

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solving equations with unknown numbers and variables with the four operations. 

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It's a precursor to solving an equation.

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The fact that the variables can change based on the expression, This helps students understand the difference from an equation vs expression

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The fact that the variables can change based on the expression, This helps students understand the difference from an equation vs expression

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Seeing letters and numbers in the same equation and understanding that variables can be worth something different. 

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Seeing letters and numbers in the same equation and understanding that variables can be worth something different. 

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Any letter can represent a letter or number. More than one step needs to be used. 

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Any letter can represent a letter or number. More than one step needs to be used. 