8th grade (Eureka Math/EngageNY)
Learn eighth grade math aligned to the Eureka Math/EngageNY curriculum —functions, linear equations, geometric transformations, and more.
7 units210 videos17 hours
Learn it live with a class on Puzzicle · Teachers: use it with your class
Unit 1: Module 1: Integer exponents and scientific notation
Topic A: Exponential notation and properties of integer exponents
Exponent properties with products ✓ Check-ins14:00
Exponent properties with parentheses ✓ Check-ins5:58
Exponent properties with quotients ✓ Check-ins9:22
Negative exponents ✓ Check-ins7:14
Negative exponent intuition ✓ Check-ins4:38
Powers of zero ✓ Check-ins3:21
Multiplying multiples of powers of 10 ✓ Check-ins2:41
Approximating with powers of 10 ✓ Check-ins4:10
Topic B: Magnitude and scientific notation
Scientific notation examples ✓ Check-ins11:26
Scientific notation example: 0.0000000003457 ✓ Check-ins4:12
Multiplying in scientific notation example ✓ Check-ins5:23
Multiplying & dividing in scientific notation ✓ Check-ins2:53
Multiplying three numbers in scientific notation ✓ Check-ins7:35
Subtracting in scientific notation ✓ Check-ins4:13
Simplifying in scientific notation challenge ✓ Check-ins5:52
Scientific notation word problem: red blood cells ✓ Check-ins4:46
Scientific notation word problem: U.S. national debt ✓ Check-ins6:21
Scientific notation word problem: speed of light ✓ Check-ins4:27
Unit 2: Module 2: The concept of congruence
Topic A: Definitions and properties of the basic rigid motions
Introduction to geometric transformations ✓ Check-ins3:06
Identifying transformations ✓ Check-ins3:47
Translating points ✓ Check-ins3:51
Translating shapes ✓ Check-ins1:55
Determining translations ✓ Check-ins1:32
Rotating points ✓ Check-ins1:50
Determining rotations ✓ Check-ins2:57
Reflecting points ✓ Check-ins3:45
Reflecting shapes ✓ Check-ins2:38
Determining reflections ✓ Check-ins1:40
Topic B: Sequencing the basic rigid motions
Topic C: Congruence and angle relationships
Congruence and similarity — Basic example ✓ Check-ins4:19
Congruence and similarity — Harder example ✓ Check-ins3:18
Angles, parallel lines, & transversals ✓ Check-ins7:07
Parallel & perpendicular lines ✓ Check-ins3:35
Missing angles with a transversal ✓ Check-ins2:16
Measures of angles formed by a transversal ✓ Check-ins4:41
Angles in a triangle sum to 180° proof ✓ Check-ins4:28
Triangle exterior angle example ✓ Check-ins6:03
Worked example: Triangle angles (intersecting lines) ✓ Check-ins4:55
Worked example: Triangle angles (diagram) ✓ Check-ins5:42
Triangle angle challenge problem ✓ Check-ins8:37
Triangle angle challenge problem 2 ✓ Check-ins6:05
Topic D: The Pythagorean theorem
Unit 3: Module 3: Similarity
Topic A: Dilation
Topic B: Similar figures
Topic C: The Pythagorean theorem
Intro to the Pythagorean theorem ✓ Check-ins10:46
Pythagorean theorem example ✓ Check-ins4:17
Pythagorean theorem word problem: carpet ✓ Check-ins3:00
Pythagorean theorem with isosceles triangle ✓ Check-ins3:48
Pythagorean theorem word problem: fishing boat ✓ Check-ins4:32
Thiago asks: How much time does a goalkeeper have to react to a penalty kick? ✓ Check-ins ✎ Fixed a slip12:05
Garfield's proof of the Pythagorean theorem ✓ Check-ins8:56
Bhaskara's proof of the Pythagorean theorem ✓ Check-ins9:03
Pythagorean theorem proof using similarity ✓ Check-ins9:52
Another Pythagorean theorem proof ✓ Check-ins10:23
Unit 4: Module 4: Linear equations
Topic A: Writing and solving linear equations
Intro to equations with variables on both sides ✓ Check-ins8:53
Equations with variables on both sides: 20-7x=6x-6 ✓ Check-ins4:06
Equation with variables on both sides: fractions ✓ Check-ins4:50
Equation with the variable in the denominator ✓ Check-ins3:24
Equations with parentheses ✓ Check-ins6:04
Number of solutions to equations ✓ Check-ins5:28
Worked example: number of solutions to equations ✓ Check-ins1:55
Creating an equation with no solutions ✓ Check-ins1:23
Creating an equation with infinitely many solutions ✓ Check-ins1:40
Topic B: Linear equations in two variables and their graphs
Rates & proportional relationships example ✓ Check-ins1:25
Rates & proportional relationships: gas mileage ✓ Check-ins3:19
Graphing proportional relationships: unit rate ✓ Check-ins4:31
Graphing proportional relationships from a table ✓ Check-ins1:12
Graphing proportional relationships from an equation ✓ Check-ins3:09
Points on the coordinate plane examples ✓ Check-ins6:50
Testing solutions to linear equations ✓ Check-ins3:36
Graphing a linear equation: 5x+2y=20 ✓ Check-ins4:29
Topic C: Slope and equations of lines
x-intercept of a line ✓ Check-ins1:43
Intercepts from a table ✓ Check-ins4:00
Intercepts from an equation ✓ Check-ins4:08
Worked example: intercepts from an equation ✓ Check-ins3:25
Slope & direction of a line ✓ Check-ins2:35
Worked example: slope from graph ✓ Check-ins4:40
Slope of a line: negative slope ✓ Check-ins4:00
Worked example: slope from two points ✓ Check-ins7:12
Slope of a horizontal line ✓ Check-ins5:05
Graph from slope-intercept equation ✓ Check-ins3:01
Slope-intercept equation from graph ✓ Check-ins11:11
Slope-intercept equation from slope & point ✓ Check-ins3:46
Slope-intercept equation from two points ✓ Check-ins6:42
Slope-intercept form from a table ✓ Check-ins4:26
Converting to slope-intercept form ✓ Check-ins5:07
Slope-intercept form problems ✓ Check-ins14:58
Proving slope is constant using similarity ✓ Check-ins7:56
Intro to point-slope form ✓ Check-ins6:07
Topic D: Systems of linear equations and their solutions
Systems of equations: trolls, tolls (1 of 2) ✓ Check-ins6:51
Systems of equations: trolls, tolls (2 of 2) ✓ Check-ins5:41
Testing a solution to a system of equations ✓ Check-ins2:38
Systems of equations with graphing ✓ Check-ins8:30
Systems of equations with graphing: 5x+3y=7 & 3x-2y=8 ✓ Check-ins6:35
Systems of equations with graphing: y=7/5x-5 & y=3/5x-1 ✓ Check-ins2:22
Systems of equations with graphing: chores ✓ Check-ins5:19
Systems of equations with elimination: 3t+4g=6 & -6t+g=6 ✓ Check-ins3:45
Systems of equations with elimination: x+2y=6 & 4x-2y=14 ✓ Check-ins3:38
Systems of equations with elimination: -3y+4x=11 & y+2x=13 ✓ Check-ins4:26
Systems of equations with elimination: 2x-y=14 & -6x+3y=-42 ✓ Check-ins5:05
Systems of equations with elimination: 4x-2y=5 & 2x-y=2.5 ✓ Check-ins4:57
Systems of equations with elimination: x-4y=-18 & -x+3y=11 ✓ Check-ins5:59
Systems of equations with elimination: 6x-6y=-24 & -5x-5y=-60 ✓ Check-ins ✎ Fixed a slip5:31
Systems of equations with substitution: 2y=x+7 & x=y-4 ✓ Check-ins4:39
Systems of equations with substitution: y=4x-17.5 & y+2x=6.5 ✓ Check-ins4:06
Systems of equations with substitution: -3x-4y=-2 & y=2x-5 ✓ Check-ins4:21
Systems of equations with substitution: 9x+3y=15 & y-x=5 ✓ Check-ins6:04
Systems of equations with substitution: y=-5x+8 & 10x+2y=-2 ✓ Check-ins3:44
Systems of equations with substitution: y=-1/4x+100 & y=-1/4x+120 ✓ Check-ins3:44
Systems of equations with elimination: apples and oranges ✓ Check-ins5:06
Systems of equations with elimination: TV & DVD ✓ Check-ins5:51
Systems of equations with elimination: King's cupcakes ✓ Check-ins9:00
Systems of equations with elimination: Sum/difference of numbers ✓ Check-ins2:38
Systems of equations with elimination: potato chips ✓ Check-ins9:21
Systems of equations with elimination: coffee and croissants ✓ Check-ins4:15
Systems of equations with substitution: coins ✓ Check-ins5:58
Systems of equations with substitution: potato chips ✓ Check-ins5:21
Systems of equations with substitution: shelves ✓ Check-ins8:02
Age word problem: Imran ✓ Check-ins3:43
Age word problem: Ben & William ✓ Check-ins6:28
Age word problem: Arman & Diya ✓ Check-ins5:21
Solutions to systems of equations: consistent vs. inconsistent ✓ Check-ins5:29
Systems of equations number of solutions: fruit prices (1 of 2) ✓ Check-ins9:25
Systems of equations number of solutions: fruit prices (2 of 2) ✓ Check-ins7:08
Systems of equations number of solutions: y=3x+1 & 2y+4=6x ✓ Check-ins ✎ Fixed a slip5:08
Solutions to systems of equations: dependent vs. independent ✓ Check-ins5:10
Number of solutions to a system of equations graphically ✓ Check-ins6:36
Forming systems of equations with different numbers of solutions ✓ Check-ins6:21
Comparing Celsius and Fahrenheit temperature scales ✓ Check-ins2:50
Converting Fahrenheit to Celsius ✓ Check-ins2:58
Unit 5: Module 5: Examples of functions from geometry
Topic A: Functions
What is a function? ✓ Check-ins7:57
Worked example: Evaluating functions from equation ✓ Check-ins0:59
Worked example: Evaluating functions from graph ✓ Check-ins0:44
Equations vs. functions ✓ Check-ins4:18
Manipulating formulas: temperature ✓ Check-ins2:41
Testing if a relationship is a function ✓ Check-ins2:23
Relations and functions ✓ Check-ins6:57
Recognizing functions from graph ✓ Check-ins4:07
Checking if a table represents a function ✓ Check-ins1:16
Recognizing functions from verbal description ✓ Check-ins1:31
Recognizing functions from table ✓ Check-ins4:40
Recognizing functions from verbal description word problems ✓ Check-ins3:23
Checking if an equation represents a function ✓ Check-ins3:33
Does a vertical line represent a function? ✓ Check-ins1:40
Unit 6: Module 6: Linear functions
Topic A: Linear functions
Recognizing linear functions ✓ Check-ins4:01
Linear & nonlinear functions: table ✓ Check-ins2:26
Linear & nonlinear functions: word problem ✓ Check-ins3:35
Linear & nonlinear functions: missing value ✓ Check-ins2:13
Interpreting a graph example ✓ Check-ins2:23
Comparing linear functions: equation vs. graph ✓ Check-ins2:23
Comparing linear functions: same rate of change ✓ Check-ins2:36
Comparing linear functions: faster rate of change ✓ Check-ins3:40
Topic B: Bivariate numerical data
Topic C: Linear and nonlinear models
Linear graphs word problems ✓ Check-ins5:05
Linear graphs word problem: cats ✓ Check-ins2:43
Linear equations word problems: volcano ✓ Check-ins5:58
Linear equations word problems: earnings ✓ Check-ins4:03
Modeling with linear equations: snow ✓ Check-ins4:58
Comparing linear functions word problem: climb ✓ Check-ins4:44
Comparing linear functions word problem: walk ✓ Check-ins3:44
Comparing linear functions word problem: work ✓ Check-ins3:46
Linear function example: spending money ✓ Check-ins5:22
Modeling with linear equations: gym membership & lemonade ✓ Check-ins10:05
Fitting a line to data ✓ Check-ins7:48
Unit 7: Module 7: Introduction to irrational numbers using geometry
Topic A: Square and cube roots
Intro to square roots ✓ Check-ins5:24
Intro to cube roots ✓ Check-ins8:01
Worked example: Cube root of a negative number ✓ Check-ins4:18
Square root of decimal ✓ Check-ins3:04
Dimensions of a cube from its volume ✓ Check-ins3:35
Intro to rational & irrational numbers ✓ Check-ins5:55
Classifying numbers: rational & irrational ✓ Check-ins2:18
Classifying numbers ✓ Check-ins8:49
Approximating square roots ✓ Check-ins4:48
Approximating square roots to hundredths ✓ Check-ins7:12
Topic B: Decimal expansions of numbers
Converting a fraction to a repeating decimal ✓ Check-ins4:25
Converting repeating decimals to fractions (part 1 of 2) ✓ Check-ins4:03
Converting repeating decimals to fractions (part 2 of 2) ✓ Check-ins9:06
Comparing irrational numbers with radicals ✓ Check-ins5:29
Comparing values with calculator ✓ Check-ins4:01
Topic C: The Pythagorean theorem
Finding distance with Pythagorean theorem ✓ Check-ins3:41
Distance formula ✓ Check-ins9:39
Use Pythagorean theorem to find area of an isosceles triangle ✓ Check-ins4:00
Pythagorean theorem word problem: carpet ✓ Check-ins3:00
Pythagorean theorem word problem: fishing boat ✓ Check-ins4:32
Pythagorean theorem in 3D ✓ Check-ins5:56
Topic D: Applications of radicals and roots
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