8th grade (Eureka Math Squared-aligned)
This course contains Khan Academy practice problems crafted to support the Eureka Math Squared (EM2) curriculum. Designed to make it easier for districts, teachers, and students to find and use practice problems that complement EM2 lessons, this course was not produced in official partnership with Eureka Math Squared.
6 units201 videos16 hours
Learn it live with a class on Puzzicle · Teachers: use it with your class
Unit 1: Scientific notation, exponents, and irrational numbers
Comparing large numbers
More properties of exponents
Making sense of the exponent of 0
Making sense of integer exponents
Writing equivalent expressions
Evaluating numerical expressions by using properties of exponents (optional)
Small positive numbers in scientific notation
Operations with numbers in scientific notation
Applications with numbers in scientific notation
Approximating values of roots and π^2
Familiar and not so familiar numbers
Ordering irrational numbers
Unit 2: Rigid motions and congruent figures
Motions of the plane
Translations and reflections on the coordinate plane
Rotations on the coordinate plane
Working backward
Ordering sequences of rigid motions
Showing figures are congruent
Lines cut by a transversal
Angle sum of a triangle
Exterior angles of triangles
Find unknown angle measures
Using the Pythagorean theorem and its converse
Distance in the coordinate plane
Unit 3: Dilations and similar figures
Exploring dilations
Reductions and more enlargements
Using lined paper to explore dilations
Dilations on a grid
Dilations on the coordinate plane
Describing dilations
Sequencing transformations
Similar figures
Using similar figures to find unknown side lengths
Similar right triangles
Similar triangles on a line
Unit 4: Linear equations in one and two variables
Equations
The distributive property with variables ✓ Check-ins6:14
Factoring with the distributive property ✓ Check-ins3:28
Same thing to both sides of equations ✓ Check-ins2:32
Intro to two-step equations ✓ Check-ins5:12
Two-step equations intuition ✓ Check-ins8:41
Worked example: two-step equations ✓ Check-ins3:04
Solving linear equations
Solving linear equations with rational coefficients
Using linear equations to solve problems
Linear equations with more than one solution
Another possible number of solutions
Writing linear equations
Solutions to linear equations in two variables
The graph of a linear equation in two variables
Lines with special characteristics
Comparing proportional relationships
Proportional relationships and slope
Slopes of rising lines
Slopes of falling lines
Using coordinates to find slope
Slope-intercept form of the equation of a line
Slope and parallel lines
Point-slope form of the equation of a line
Comparing equations in different forms
The patterns, the pops, and the pastries
Get to work
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
Linear function example: spending money ✓ Check-ins5:22
Unit 5: Systems of linear equations
Introduction to systems of linear equations
Systems of equations with graphing ✓ Check-ins8:30
Systems of equations with graphing: y=7/5x-5 & y=3/5x-1 ✓ Check-ins2:22
Systems of equations with graphing: 5x+3y=7 & 3x-2y=8 ✓ Check-ins6:35
Systems of equations with graphing: chores ✓ Check-ins5:19
Systems of equations with graphing: exact & approximate solutions ✓ Check-ins5:56
Identifying solutions
More than one solution
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
Solutions to systems of equations: dependent vs. independent ✓ Check-ins5:10
Number of solutions to a system of equations ✓ Check-ins3:26
Number of solutions to a system of equations graphically ✓ Check-ins6:36
Number of solutions to a system of equations algebraically ✓ Check-ins6:01
How many solutions does a system of linear equations have if there are at least two? ✓ Check-ins2:12
The substitution method
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: 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
Rewriting equations to solve a system of equations
Writing and solving systems of equations for real-world problems
Age word problem: Imran ✓ Check-ins3:43
Age word problem: Ben & William ✓ Check-ins6:28
Age word problem: Arman & Diya ✓ Check-ins5:21
System of equations word problem: walk & ride ✓ Check-ins7:00
System of equations word problem: no solution ✓ Check-ins5:03
System of equations word problem: infinite solutions ✓ Check-ins5:01
Systems of equations with substitution: coins ✓ Check-ins5:58
Unit 6: Functions and bivariate statistics
Definition of a function
What is a function? ✓ Check-ins7:57
Worked example: Evaluating functions from equation ✓ Check-ins0:59
Function notation example ✓ Check-ins2:13
Worked example: Evaluating functions from graph ✓ Check-ins0:44
Equations vs. functions ✓ Check-ins4:18
Manipulating formulas: temperature ✓ Check-ins2:41
Obtaining a function from an equation ✓ Check-ins3:04
Linear functions and proportionality
More examples of functions
Testing if a relationship is a function ✓ Check-ins2:23
Relations and functions ✓ Check-ins6:57
Checking if a table represents a function ✓ Check-ins1:16
Recognizing functions from table ✓ Check-ins4:40
Checking if an equation represents a function ✓ Check-ins3:33
Recognizing functions from verbal description ✓ Check-ins1:31
Recognizing functions from verbal description word problems ✓ Check-ins3:23
Graphs of functions and equations
Interpreting rate of change and initial value
Comparing functions
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
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
Increasing and decreasing functions
Scatter plots
Patterns in scatter plots
Informally fitting a line to data
Determining an equation of a line fit to data
Linear models
Bivariate categorical data
Association in bivariate categorical data
Analyzing bivariate categorical data
Volumes of prisms and pyramids
Volume of cylinders
Volume of cones
Volume of spheres
Learn this with a class
With a class on Puzzicle this course runs as a timetable of live study parties: your batch watches together and answers the check-ins, sometimes with a teacher leading.
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