8th Grade Math Posters

Who doesn't need helpful reminders posted all around to be gentle messages of encouragement?

This is a huge collection of print ready sheets that can easily transform your classroom walls into a helpful reminder for all of your Common Core Standard topics.

We recommend using a little bit of the color cartridge for this area. We would also encourage you to laminate them for future use and easy transport.

The Number System

Irrational Numbers and Decimal Expansion - 8.NS.A.1



• Expanding Decimals - Know your place values in order to be able to turn a fraction into a decimal or decimal into a fraction.
• Back and Forth - Irrational numbers cannot be written as simple fractions or as the ratio of two integers.



Approximations of Irrational Numbers - 8.NS.A.2



• Number Line Markers - A radical is used to express a root in math. A radical is actually a sign (√). The number that appears under the sign is a radicand.
• Double Number Lines - Comparing radicals is just like comparing any number, but you must first find the square root or a number very close to the square root of the given number.

Expressions and Equations

Properties of Integer Exponents - 8.EE.A.1

• Using Negative Exponents - Solving exponents is as simple as multiplying a number times itself as the exponent denotes.
• Using Squares - A quantity representing the power to which a given number is to be raised.



Evaluating Negative Exponents - 8.EE.A.1



• Positive Vs. Negative Exponents - A negative exponent tells the user how many times to divide a number.
• Mechanics of Exponents - Turn the negative into a positive by placing a 1 over the positive version of the exponent.



Square and Cube Roots - 8.EE.A.2



• Square Roots - The square root of a number are equal factors of the number itself.
• Cube Roots - Cube roots are like square roots only the root is a number times itself three times.



Square Root Word Problems - 8.EE.A.2



• Square Footage - Square footage is determined by measuring the length times the width of an area that is square.
• Square Rooms - Solve the problem. Make sure your answer specifies feet, inches, or another form of measurement.



Powers of Ten and Scientific Notation - 8.EE.A.3



• Breakdown - Scientific notation is the way in which scientists handle very large or very small numbers.
• Positive Right, Negative Left - The power shows you how many places to the left or right you need to move the decimal.



Scientific Notation Word Problems - 8.EE.A.4



• Sci. Notation Process - Slow Down! Find exactly what information you need.
• Orange Grove Population - Are there more or less people in Orange Grove in 2012?



Scientific Notation Addition and Subtraction - 8.EE.A.4



• Power Matches - The power or exponent of ten must match before you can do addition or subtraction.
• Rolling the Decimal - First, make the powers match by moving the decimal.



Scientific Notation Multiplication and Division - 8.EE.A.4



• Sci. Notation Products - Begin by separating the problem into the separate components. Constants/Powers
• Sci. Notation Quotients - When dividing with scientific notation begin by separating constants and powers.



Graphing Proportional Relationships- 8.EE.B.5



• Examples - The graph shows the number of miles walked by Diane. Sandra walked at a constant pace as represented by the equation. Who walked faster?
• The Process Chart - Graph or create an equation to solve the problem you are given.



Using Similar Triangles to Find Slope - 8.EE.B.6



• Showing Slope - Slope is a ratio shown between the change in y and x (y/x) on a graph. This is known as rise/run.
• Rise Over Run - The change in y and x on a graph helps determine slope of a straight line. One way in which the rise/run can be found is by using triangles.




Linear Equations in One Variable- 8.EE.C.7a



• How Many Solutions? - How many solutions can one equation have?
• Words to Equations - Five more than a certain number is 15 more than 3 times that number. What is the number?




Simultaneous Linear Equations- 8.EE.C.7b



• Double Equations - Simultaneous equations are the use of two equations at the same time. Simultaneous equations can be graphed at the same time.
• Where Are the Points? - Remember you may have to create points based on the information you have to show where the lines meet.




Two Linear Equations in Two Variables- 8.EE.C.8



• Two in Two - Place the value of x that you have found into either of the equations. This gives you the y value.
• Word Problem Example - Jenny has two children, Joel and Anne. Joel is twice as old as Anne. 90 is the total age of both of them. How old is Anne?

Functions

Functions as Inputs and Outputs- 8.F.A.1



• What's a Function Table? - A function table shows how a set of ordered pairs follows a rule. The rules show the relationship between the two numbers.
• Reading the Axes - Use the graph to solve the problem by simply reading the (x, y) axes.



Solving Basic Function Tables - 8.F.A.1



• Introduction to Tables - A function table provides you with an equation and part of the information. It is your job to fill in the missing information.
• Solve the Rest - When a table only gives us part of the information, we must solve for the rest.



Comparing Properties of Two Functions- 8.F.A.2



• Know Your Formulas - Read each problem in full. Solve the problems separately. Compare the answers for both sets of information in order to find the correct answer.
• Apples to Oranges - To compare linear functions, you must use the formula y = mx + b to compare the rate of change.



Equation of a Straight Line- 8.F.B.3



• Linear vs. Non-Linear - Linear = Straight line when graphed and no exponents.
• Diagram Models - Linear means graphed as a straight line. Non-linear means graphed as a non-straight or varying line.



Using Functions to Model a Linear Relationship - 8.F.B.4



• Table It! - Use the tables that are given to solve the problem.
• Explaining y = mx + b - M = slope of a straight line B = y intercept Y intercept = where the lines touch



Point and Slope- 8.F.B.4



• Zero Slope - A zero slope is the slope of a horizontal line. This means no change in the ycoordinate.
• Change in y/x - Zero slope means a horizontal line.



Understanding the y-Intercept- 8.F.B.4



• Create an Equation - Sometimes we are simply asked to create an equation that could be graphed if needed.
• KISS - Always read the entire problem before trying to create an expression.



Analyzing Functional Relationships by Graphing - 8.F.B.5



• Look It Over! - Sabrina made a graph of her trip to school. She started out walking, but running late tried to jog. She just made it to catch the bus, which stopped at school.
• Beyond Plotted Points - Move beyond plotting points to describe what is meant by the graph.

Geometry

Properties of Rotations, Reflections, and Translations- 8.G.A.1

• All Transformations - A rotation turns a figure on a fixed point. Turn in a clockwise direction unless told otherwise.
• On a Coordinate Grid - Transformations move a point from one spot to another, an assigned difference.



Two-dimensional Congruent Figures- 8.G.A.2



• When Are They Congruent? - Figures are congruent if the second figure is produced by translating each vertex of the first figure in a different spot.
• Shape on a Grid - In order for a shape to be congruent with another it must be both the same shape and size.



Understanding Congruent Shapes - 8.G.A.2



• Same Size and Shape - Two shapes are congruent to one another if they are the same shape and size.
• Ask Yourself - Are both objects the same shape? Are both objects the same size?



Dilations, Translations, Rotations, and Reflections- 8.G.A.3



• Which Is It? - Translations move a point from one area to another based on what has been asked.
• All Forms On Grids - Rotations (Rotate 180 degrees) Reflections (Mirror images)



Understanding Similar Figures- 8.G.A.4



• Congruent vs. Similar - Similar = Same Shape - Different Size
• Things To Remember - The same, but different.



Angle Sums and Exterior Angles of Triangles- 8.G.A.5



• Triangle Angle Sum Theorem - The angle measures in any triangle add up to 180 degrees.
• Equaling 180 Degrees - Corresponding angles will always equal 180 degrees.



Pythagorean Theorem Proofs and its Converse - 8.G.B.6



• Using the Theorem - A walkthrough for you.
• Identifying Right Triangles - In a right triangle, where a and b are the lengths of the legs and c is the length of the hypotenuse.



Unknown Side Lengths in Right Triangle- 8.G.B.7



• Know 2 Sides? - If you know two side lengths on a right triangle, the third is simple to find using the Pythagorean Theorem.
• Triangle House - I am very close to my friends. We have bought houses that form a triangle. Sarah is 10 miles away and Terra is 11 miles away. My house forms the triangle. How far away is a it?



Pythagorean Theorem On Coordinate Systems- 8.G.B.8



• Distance Between Points - The Pythagorean Theorem can be used to find the distance between two points on a coordinate plane.
• Using Coordinate Graphs - Create a right triangle using the line given as the unknown. Count the difference on the x- axis, than the yaxis.



Pythagorean Theorem Word Problems - 8.G.B.8



• Jenny the Hiker - When using the Pythagorean Theorem in word problems a perfect right triangle must be created by the problem.
• What To Look For - No matter what type of word problem you encounter: Read the ENTIRE problem first.



Volumes of Cones, Cylinders, and Spheres - 8.G.C.9



• How Much Can It Hold? - Volume shows the total amount a single container can hold.
• Formulas For Shapes - Visuals with equations.

Statistics & Probability

Scatter Plots for Bivariate Data- 8.SP.A.1

• What Are Scatter Plots? - Scatter plots are graphs that compare two sets of data, one on the x-axis and one on the y-axis.
• Trends - Scatter plots show one set of data compared to another, such as test scores in two classes.



Using Straight Lines to Model Relationships - 8.SP.A.2



• Steps to Modeling - Defining a relationship can be difficult when just looking at data. So graph it!
• Plot a Straight Line - This is a positive trend. As one set of information increases, so does the other.



Interpreting Slope and Intercept- 8.SP.A.3



• Positive Trends - Create a scatter plot to show all the data provided.
• Slope on Graphs - Some problems offer you only a basic problem.



Patterns of Association (Using Data Tables)- 8.SP.A.4



• Chart It! - Patterns of association are found when two areas are surveyed, often with a single question.
• Soda Buyers Club - Information will be provided for you. This information should be used to answer logical questions.