Algebra 1 (TX TEKS) IMRA 2026 publisher-initiated changes
11 units281 videos25 hours
Learn it live with a class on Puzzicle · Teachers: use it with your class
Unit 1: Linear expressions, equations, and inequalities
Overview and history of algebra
Distributive property with variables
The distributive property & equivalent expressions
Combining like terms
Linear equations with variables on both sides
Why we do the same thing to both sides: Variable on both sides ✓ Check-ins7:36
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
Linear equations with parentheses
Multi-step inequalities
Add and subtract polynomials of degree one and two
Divide polynomials of degree one
Division by zero
Linear equations with unknown coefficients
Unit 2: Introduction to functions
Recognizing functions
What is a function? ✓ Check-ins7:57
Recognizing functions from graph ✓ Check-ins4:07
Does a vertical line represent a function? ✓ Check-ins1:40
Recognizing functions from table ✓ Check-ins4:40
Recognizing functions from verbal description ✓ Check-ins1:31
Recognizing functions from verbal description word problems ✓ Check-ins3:23
Evaluating functions
Introduction to the domain and range of a function
Unit 3: Investigation of linear functions and inequalities with two variables
Slope
Horizontal & vertical lines
Function transformations
x-intercepts and y-intercepts
Intro to slope-intercept form
Graphing slope-intercept equations
Writing slope-intercept equations
Writing linear equations from tables
Standard form
Graphing two-variable inequalities
Writing two-variable inequalities from tables and graphs
Unit 4: Application of linear functions
Direct proportions
Point-slope form
Equations of parallel & perpendicular lines
Parallel lines from equation ✓ Check-ins3:48
Parallel lines from equation (example 2) ✓ Check-ins3:03
Parallel lines from equation (example 3) ✓ Check-ins2:42
Writing equations of parallel lines ✓ Check-ins4:38
Writing equations of perpendicular lines ✓ Check-ins3:01
Writing equations of perpendicular lines (example 2) ✓ Check-ins1:45
Forms of two-variable linear equations
Determining the domain and range of a function
Applying intercepts and slope
Constructing linear models for real-world relationships
Linear equations from verbal descriptions
Linear equation word problems
Correlation coefficient intuition
Correlation in statistics
Estimating lines of best fit
Estimating the line of best fit exercise ✓ Check-ins1:17
Fitting a line to data ✓ Check-ins7:48
Fitting a line to data using a graphing calculator (IMRA 2026 publisher-initiated change) ✓ Check-ins6:13
Line of best fit: smoking in 1945 ✓ Check-ins4:47
Estimating with linear regression (linear models) ✓ Check-ins3:23
Interpreting a trend line ✓ Check-ins3:28
Unit 5: Systems of linear equations and inequalities
Introduction to systems of equations
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: y=7/5x-5 & y=3/5x-1 ✓ Check-ins2:22
Systems of equations with graphing: exact & approximate solutions ✓ Check-ins5:56
Number of solutions to systems of equations
Write a system of equations from a table or graph
Systems of equations from context
Interpreting points relative to a system of equations
Solving systems of equations with substitution
Solving systems of equations with elimination
Systems of equations with elimination: King's cupcakes ✓ Check-ins9:00
Elimination strategies ✓ Check-ins7:16
Systems of equations with elimination: x-4y=-18 & -x+3y=11 ✓ Check-ins5:59
Systems of equations with elimination: potato chips ✓ Check-ins9:21
Systems of equations with elimination (and manipulation) ✓ Check-ins12:01
Equivalent systems of equations
Systems of equations word 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 elimination: TV & DVD ✓ Check-ins5:51
Systems of equations with elimination: apples and oranges ✓ Check-ins5:06
Systems of equations with substitution: coins ✓ Check-ins5:58
Systems of equations with elimination: coffee and croissants ✓ Check-ins4:15
Graphing systems of two-variable inequalities
Unit 6: Properties of expressions and factoring
Add and subtract polynomials of degree two
Multiplying monomials by polynomials
Multiplying binomials
Special products of binomials
Multiplying polynomials of degree two
Introduction to factoring
Factoring quadratics intro
Factoring quadratics by grouping
Factoring quadratics with perfect squares
Perfect square factorization intro ✓ Check-ins5:19
Factoring perfect squares ✓ Check-ins4:54
Identifying perfect square form ✓ Check-ins4:37
Factoring perfect squares: negative common factor ✓ Check-ins3:52
Factoring perfect squares: missing values ✓ Check-ins2:39
Factoring perfect squares: shared factors ✓ Check-ins4:26
Factoring quadratics with difference of squares
Strategy in factoring quadratics
Dividing quadratics by linear factors
Unit 7: Properties of exponents
Exponent properties intro
Exponent properties review
Properties of rational exponents
Unit 8: Quadratic equations and simplification of radical expressions
Simplifying square roots
Solving by taking the square root
Solving quadratics by factoring
Completing the square intro
Completing the square ✓ Check-ins14:06
Worked example: Completing the square (intro) ✓ Check-ins3:22
Worked example: Rewriting expressions by completing the square ✓ Check-ins3:02
Worked example: Rewriting and solving equations by completing the square (IMRA 2026 publisher-initiated change) ✓ Check-ins6:18
More on completing the square
The quadratic formula
Unit 9: Investigation and application of quadratic functions
Intro to parabolas
Solving and graphing with factored form
Writing quadratics from vertex
Quadratic standard form
Quadratic functions from solutions or a graph
Features & forms of quadratic functions
Comparing quadratic functions
Transforming quadratic functions
Writing quadratics to fit data
Unit 10: Investigation and application of exponential functions
Exponential vs. linear growth
Exponential expressions
Interpreting exponential expression word problems
Graphs of exponential growth
Exponential growth & decay
Writing functions with exponential decay
Exponential functions from tables & graphs
Writing exponential functions ✓ Check-ins1:40
Writing exponential functions from tables ✓ Check-ins5:17
Writing exponential functions from graphs ✓ Check-ins7:25
Analyzing tables of exponential functions ✓ Check-ins7:20
Analyzing graphs of exponential functions ✓ Check-ins4:06
Analyzing graphs of exponential functions: negative initial value ✓ Check-ins6:07
Identifying key features of exponential functions
Identifying key features of exponential functions in real world problems
Linear vs. exponential models
Unit 11: Arithmetic and geometric sequences
Introduction to arithmetic sequences
Introduction to geometric sequences
Graphing arithmetic and geometric sequences
Constructing arithmetic sequences
Constructing geometric sequences
Learn this with a class
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