IXL skill plan | Advanced 2 plan for Into Math

Skill plan for Into Math - Advanced 2

IXL provides skill alignments with recommended IXL skills for each unit. Find the IXL skills that are right for you below!

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1	Unit 1 Transform and Construct Geometric Figures
Module 1 - Transformations and Congruence
Lesson 1: Investigate Transformations		1. Describe how a figure moves Also consider: • Graph triangles and quadrilaterals • Line symmetry • Rotational symmetry
Lesson 1: Investigate Transformations
1. Describe how a figure moves Also consider: • Graph triangles and quadrilaterals • Line symmetry • Rotational symmetry

Lesson 2: Explore Translations		1. Translations: graph the image 2. Translations: find the coordinates 3. Translations: write the rule
Lesson 2: Explore Translations
1. Translations: graph the image 2. Translations: find the coordinates 3. Translations: write the rule

Lesson 3: Explore Reflections		1. Reflections over the x- and y-axes: graph the image 2. Reflections over the x- and y-axes: find the coordinates Also consider: • Reflections: graph the image
Lesson 3: Explore Reflections
1. Reflections over the x- and y-axes: graph the image 2. Reflections over the x- and y-axes: find the coordinates Also consider: • Reflections: graph the image

Lesson 4: Explore Rotations		1. Rotations: graph the image 2. Rotations: find the coordinates Also consider: • Reflections and rotations: write the rule • Describe transformations • Identify reflections, rotations, and translations
Lesson 4: Explore Rotations
1. Rotations: graph the image 2. Rotations: find the coordinates Also consider: • Reflections and rotations: write the rule • Describe transformations • Identify reflections, rotations, and translations

Lesson 5: Understand and Recognize Congruent Figures		1. Sequences of congruence transformations: choose the sequence 2. Sequences of congruence transformations: graph the image Also consider: • Identify congruent figures • Side lengths and angle measures of congruent figures • Determine if two figures are congruent: justify your answer
Lesson 5: Understand and Recognize Congruent Figures
1. Sequences of congruence transformations: choose the sequence 2. Sequences of congruence transformations: graph the image Also consider: • Identify congruent figures • Side lengths and angle measures of congruent figures • Determine if two figures are congruent: justify your answer
Module 2 - Draw and Analyze Two-Dimensional Figures
Lesson 1: Draw Shapes with Given Conditions		1. Parts of a circle 2. Draw quadrilaterals
Lesson 1: Draw Shapes with Given Conditions
1. Parts of a circle 2. Draw quadrilaterals

Lesson 2: Draw and Construct Triangles Given Side Lengths		1. Triangle inequality
Lesson 2: Draw and Construct Triangles Given Side Lengths
1. Triangle inequality

Lesson 3: Draw and Construct Triangles Given Angle Measures
Lesson 3: Draw and Construct Triangles Given Angle Measures


Lesson 4: Draw and Analyze Shapes to Solve Problems
Lesson 4: Draw and Analyze Shapes to Solve Problems


Lesson 5: Practice Proportional Reasoning with Scale Drawings		1. Scale drawings: word problems 2. Scale drawings: scale factor word problems
Lesson 5: Practice Proportional Reasoning with Scale Drawings
1. Scale drawings: word problems 2. Scale drawings: scale factor word problems
Module 3 - Transformations and Similarity
Lesson 1: Investigate Reductions and Enlargements		1. Classify dilations
Lesson 1: Investigate Reductions and Enlargements
1. Classify dilations

Lesson 2: Explore Dilations		1. Dilations: graph the image 2. Dilations: find the coordinates 3. Dilations: find scale factor and the center of the dilation
Lesson 2: Explore Dilations
1. Dilations: graph the image 2. Dilations: find the coordinates 3. Dilations: find scale factor and the center of the dilation

Lesson 3: Understand and Recognize Similar Figures		1. Similar figures 2. Determine if two figures are similar: justify your answer Also consider: • Side lengths and angle measures of similar figures
Lesson 3: Understand and Recognize Similar Figures
1. Similar figures 2. Determine if two figures are similar: justify your answer Also consider: • Side lengths and angle measures of similar figures

2	Unit 2 Equations and Inequalities in One Variable
Module 4 - Solve Linear Equations
Lesson 1: Write Two-Step Equations for Situations		1. Choose two-step equations: word problems Also consider: • Write an equation from words
Lesson 1: Write Two-Step Equations for Situations
1. Choose two-step equations: word problems Also consider: • Write an equation from words

Lesson 2: Apply Two-Step Equations to Solve Real-World Problems		1. Solve two-step equations 2. Solve two-step equations: word problems 3. Solve equations: complete the solution Also consider: • Solve two-step equations with fractions • Model and solve equations using algebra tiles
Lesson 2: Apply Two-Step Equations to Solve Real-World Problems
1. Solve two-step equations 2. Solve two-step equations: word problems 3. Solve equations: complete the solution Also consider: • Solve two-step equations with fractions • Model and solve equations using algebra tiles

Lesson 3: Solve Multi-Step Linear Equations		1. Solve multi-step equations 2. Solve multi-step equations with fractional coefficients Also consider: • Solve equations involving like terms • Solve equations with variables on both sides • Solve equations using the distributive property • Solve equations: mixed review
Lesson 3: Solve Multi-Step Linear Equations
1. Solve multi-step equations 2. Solve multi-step equations with fractional coefficients Also consider: • Solve equations involving like terms • Solve equations with variables on both sides • Solve equations using the distributive property • Solve equations: mixed review

Lesson 4: Examine Special Cases		1. Find the number of solutions 2. Create equations with no solutions or infinitely many solutions
Lesson 4: Examine Special Cases
1. Find the number of solutions 2. Create equations with no solutions or infinitely many solutions

Lesson 5: Apply Linear Equations		1. Write and solve equations using angle relationships 2. Solve equations with variables on both sides: word problems Also consider: • Solve one-step and two-step equations: word problems • Identify complementary, supplementary, vertical, adjacent, and congruent angles • Find measures of complementary, supplementary, vertical, and adjacent angles
Lesson 5: Apply Linear Equations
1. Write and solve equations using angle relationships 2. Solve equations with variables on both sides: word problems Also consider: • Solve one-step and two-step equations: word problems • Identify complementary, supplementary, vertical, adjacent, and congruent angles • Find measures of complementary, supplementary, vertical, and adjacent angles
Module 5 - Solve Problems Using Inequalities
Lesson 1: Understand and Apply Properties to Solve One-Step Inequalities		1. Solve one-step inequalities 2. Graph solutions to one-step inequalities 3. One-step inequalities: word problems
Lesson 1: Understand and Apply Properties to Solve One-Step Inequalities
1. Solve one-step inequalities 2. Graph solutions to one-step inequalities 3. One-step inequalities: word problems

Lesson 2: Write Two-Step Inequalities for Situations
Lesson 2: Write Two-Step Inequalities for Situations


Lesson 3: Apply Two-Step Inequalities to Solve Problems		1. Solve two-step inequalities 2. Graph solutions to two-step inequalities
Lesson 3: Apply Two-Step Inequalities to Solve Problems
1. Solve two-step inequalities 2. Graph solutions to two-step inequalities

3	Unit 3 Similarity, Slope, and Linear Functions
Module 6 - Angle Relationships
Lesson 1: Develop Angle Relationships for Triangles		1. Find missing angles in triangles 2. Triangle Angle-Sum Theorem 3. Exterior Angle Theorem
Lesson 1: Develop Angle Relationships for Triangles
1. Find missing angles in triangles 2. Triangle Angle-Sum Theorem 3. Exterior Angle Theorem

Lesson 2: Investigate Angle-Angle Similarity		1. Angle-angle criterion for similar triangles 2. Similar triangles and indirect measurement Also consider: • Side lengths and angle measures of similar triangles
Lesson 2: Investigate Angle-Angle Similarity
1. Angle-angle criterion for similar triangles 2. Similar triangles and indirect measurement Also consider: • Side lengths and angle measures of similar triangles

Lesson 3: Explore Parallel Lines Cut by a Transversal		1. Transversals of parallel lines: name angle pairs 2. Transversals of parallel lines: find angle measures 3. Transversals of parallel lines: solve for x
Lesson 3: Explore Parallel Lines Cut by a Transversal
1. Transversals of parallel lines: name angle pairs 2. Transversals of parallel lines: find angle measures 3. Transversals of parallel lines: solve for x
Module 7 - Proportional Relationships
Lesson 1: Explain Slope with Similar Triangles		1. Find the slope of a graph: proportional relationships Also consider: • Find the constant of proportionality from a table • Find the constant of proportionality from a graph • Solve proportions: word problems
Lesson 1: Explain Slope with Similar Triangles
1. Find the slope of a graph: proportional relationships Also consider: • Find the constant of proportionality from a table • Find the constant of proportionality from a graph • Solve proportions: word problems

Lesson 2: Derive y = mx		1. Write equations for proportional relationships from tables and graphs 2. Write and solve equations for proportional relationships 3. Graph proportional relationships from equations Also consider: • Identify proportional relationships by graphing • Identify proportional relationships from graphs and equations • Identify proportional relationships from tables
Lesson 2: Derive y = mx
1. Write equations for proportional relationships from tables and graphs 2. Write and solve equations for proportional relationships 3. Graph proportional relationships from equations Also consider: • Identify proportional relationships by graphing • Identify proportional relationships from graphs and equations • Identify proportional relationships from tables

Lesson 3: Graph, Interpret, and Compare Proportional Relationships		1. Complete a table and graph a proportional relationship 2. Interpret graphs of proportional relationships 3. Compare proportional relationships represented in different ways Also consider: • Graph proportional relationships and find the slope • Identify independent and dependent variables • Unit rates
Lesson 3: Graph, Interpret, and Compare Proportional Relationships
1. Complete a table and graph a proportional relationship 2. Interpret graphs of proportional relationships 3. Compare proportional relationships represented in different ways Also consider: • Graph proportional relationships and find the slope • Identify independent and dependent variables • Unit rates
Module 8 - Understand and Analyze Functions
Lesson 1: Understand and Graph Functions		1. Identify functions 2. Identify functions: graphs 3. Domain and range of functions 4. Domain and range of linear functions: word problems Also consider: • Complete a table for a linear function: word problems • Complete a table for a function graph
Lesson 1: Understand and Graph Functions
1. Identify functions 2. Identify functions: graphs 3. Domain and range of functions 4. Domain and range of linear functions: word problems Also consider: • Complete a table for a linear function: word problems • Complete a table for a function graph

Lesson 2: Derive and Interpret y = mx + b		1. Find the slope from a graph 2. Graph a line from an equation in slope-intercept form 3. Write a linear equation from a slope and a point 4. Convert a linear equation in standard form to slope-intercept form Also consider: • Find the slope from two points • Find the slope from a table
Lesson 2: Derive and Interpret y = mx + b
1. Find the slope from a graph 2. Graph a line from an equation in slope-intercept form 3. Write a linear equation from a slope and a point 4. Convert a linear equation in standard form to slope-intercept form Also consider: • Find the slope from two points • Find the slope from a table

Lesson 3: Interpret Rate of Change and Initial Value		1. Rate of change of a linear function: graphs 2. Interpret the slope and y-intercept of a linear function 3. Interpret points on the graph of a linear function 4. Rate of change of a linear function: tables Also consider: • Rate of change: tables • Rate of change: graphs
Lesson 3: Interpret Rate of Change and Initial Value
1. Rate of change of a linear function: graphs 2. Interpret the slope and y-intercept of a linear function 3. Interpret points on the graph of a linear function 4. Rate of change of a linear function: tables Also consider: • Rate of change: tables • Rate of change: graphs

Lesson 4: Construct and Compare Functions		1. Write a linear equation from a graph 2. Write a linear function from a table 3. Write linear functions: word problems 4. Compare linear functions: tables, graphs, and equations Also consider: • Write a linear equation from two points
Lesson 4: Construct and Compare Functions
1. Write a linear equation from a graph 2. Write a linear function from a table 3. Write linear functions: word problems 4. Compare linear functions: tables, graphs, and equations Also consider: • Write a linear equation from two points

Lesson 5: Describe and Sketch Nonlinear Functions		1. Identify linear and nonlinear functions: graphs and equations 2. Identify graphs: word problems Also consider: • Identify linear and nonlinear functions: tables
Lesson 5: Describe and Sketch Nonlinear Functions
1. Identify linear and nonlinear functions: graphs and equations 2. Identify graphs: word problems Also consider: • Identify linear and nonlinear functions: tables
Module 9 - Systems of Linear Equations
Lesson 1: Represent Systems by Graphing		1. Solve a system of equations by graphing: word problems
Lesson 1: Represent Systems by Graphing
1. Solve a system of equations by graphing: word problems

Lesson 2: Solve Systems by Graphing		1. Is (x, y) a solution to the system of equations? 2. Solve a system of equations by graphing Also consider: • Graph a line from an equation in standard form
Lesson 2: Solve Systems by Graphing
1. Is (x, y) a solution to the system of equations? 2. Solve a system of equations by graphing Also consider: • Graph a line from an equation in standard form

Lesson 3: Solve Systems by Substitution		1. Solve a system of equations using substitution
Lesson 3: Solve Systems by Substitution
1. Solve a system of equations using substitution

Lesson 4: Solve Systems by Elimination		1. Solve a system of equations using elimination Also consider: • Solve a system of equations using any method
Lesson 4: Solve Systems by Elimination
1. Solve a system of equations using elimination Also consider: • Solve a system of equations using any method

Lesson 5: Examine Special Systems		1. Find the number of solutions to a system of equations by graphing 2. Find the number of solutions to a system of equations
Lesson 5: Examine Special Systems
1. Find the number of solutions to a system of equations by graphing 2. Find the number of solutions to a system of equations

Lesson 6: Apply Systems of Equations		1. Solve a system of equations using any method: word problems
Lesson 6: Apply Systems of Equations
1. Solve a system of equations using any method: word problems

4	Unit 4 Data Analysis and Sampling
Module 10 - Scatter Plots
Lesson 1: Construct Scatter Plots and Examine Association		1. Create scatter plots 2. Identify trends with scatter plots 3. Outliers in scatter plots Also consider: • Identify an outlier
Lesson 1: Construct Scatter Plots and Examine Association
1. Create scatter plots 2. Identify trends with scatter plots 3. Outliers in scatter plots Also consider: • Identify an outlier

Lesson 2: Draw and Analyze Trend Lines		1. Identify lines of best fit 2. Make predictions with scatter plots Also consider: • Write equations for lines of best fit
Lesson 2: Draw and Analyze Trend Lines
1. Identify lines of best fit 2. Make predictions with scatter plots Also consider: • Write equations for lines of best fit

Lesson 3: Interpret Linear Data in Context		1. Interpret scatter plots 2. Interpret lines of best fit: word problems
Lesson 3: Interpret Linear Data in Context
1. Interpret scatter plots 2. Interpret lines of best fit: word problems
Module 11 - Proportional Reasoning with Samples
Lesson 1: Understand Representative Samples		1. Populations and samples 2. Identify representative, random, and biased samples
Lesson 1: Understand Representative Samples
1. Populations and samples 2. Identify representative, random, and biased samples

Lesson 2: Make Inferences from a Random Sample
Lesson 2: Make Inferences from a Random Sample


Lesson 3: Make Inferences from Repeated Random Samples		1. Make inferences from multiple samples
Lesson 3: Make Inferences from Repeated Random Samples
1. Make inferences from multiple samples
Module 12 - Use Statistics and Graphs to Compare Data
Lesson 1: Compare Center and Spread of Data Displayed in Dot Plots		1. Compare populations using line plots Also consider: • Interpret charts and graphs to find mean, median, mode, and range
Lesson 1: Compare Center and Spread of Data Displayed in Dot Plots
1. Compare populations using line plots Also consider: • Interpret charts and graphs to find mean, median, mode, and range

Lesson 2: Compare Center and Spread of Data Displayed in Box Plots		1. Compare populations using box plots Also consider: • Box plots • Calculate quartiles and interquartile range
Lesson 2: Compare Center and Spread of Data Displayed in Box Plots
1. Compare populations using box plots Also consider: • Box plots • Calculate quartiles and interquartile range

Lesson 3: Compare Means Using Mean Absolute Deviation and Repeated Sampling		1. Calculate mean absolute deviation
Lesson 3: Compare Means Using Mean Absolute Deviation and Repeated Sampling
1. Calculate mean absolute deviation
Module 13 - Two-Way Tables
Lesson 1: Construct and Interpret Two-Way Frequency Tables
Lesson 1: Construct and Interpret Two-Way Frequency Tables


Lesson 2: Analyze and Interpret Two-Way Relative Frequency Tables
Lesson 2: Analyze and Interpret Two-Way Relative Frequency Tables

5	Unit 5 Applications of Real Numbers and Exponents
Module 14 - Real Numbers
Lesson 1: Understand Rational and Irrational Numbers		1. Convert between repeating decimals and fractions 2. Convert between decimals and fractions or mixed numbers
Lesson 1: Understand Rational and Irrational Numbers
1. Convert between repeating decimals and fractions 2. Convert between decimals and fractions or mixed numbers

Lesson 2: Investigate Roots		1. Square roots and cube roots 2. Solve equations using square roots 3. Solve equations using cube roots 4. Identify rational and irrational numbers Also consider: • Identify rational and irrational square roots • Relationship between squares and square roots
Lesson 2: Investigate Roots
1. Square roots and cube roots 2. Solve equations using square roots 3. Solve equations using cube roots 4. Identify rational and irrational numbers Also consider: • Identify rational and irrational square roots • Relationship between squares and square roots

Lesson 3: Order Real Numbers		1. Estimate square roots and cube roots 2. Irrational numbers on number lines 3. Compare and order rational and irrational numbers Also consider: • Compare rational numbers • Put rational numbers in order
Lesson 3: Order Real Numbers
1. Estimate square roots and cube roots 2. Irrational numbers on number lines 3. Compare and order rational and irrational numbers Also consider: • Compare rational numbers • Put rational numbers in order
Module 15 - The Pythagorean Theorem
Lesson 1: Prove the Pythagorean Theorem and Its Converse		1. Pythagorean theorem: find the missing leg or hypotenuse length 2. Converse of the Pythagorean theorem: is it a right triangle?
Lesson 1: Prove the Pythagorean Theorem and Its Converse
1. Pythagorean theorem: find the missing leg or hypotenuse length 2. Converse of the Pythagorean theorem: is it a right triangle?

Lesson 2: Apply the Pythagorean Theorem		1. Pythagorean theorem: word problems Also consider: • Pythagorean theorem: find the perimeter
Lesson 2: Apply the Pythagorean Theorem
1. Pythagorean theorem: word problems Also consider: • Pythagorean theorem: find the perimeter

Lesson 3: Apply the Pythagorean Theorem in the Coordinate Plane		1. Find the distance between two points
Lesson 3: Apply the Pythagorean Theorem in the Coordinate Plane
1. Find the distance between two points
Module 16 - Exponents and Scientific Notation
Lesson 1: Know and Apply Properties of Exponents		1. Understanding negative exponents 2. Exponents: multiplication, division, and power rules 3. Evaluate expressions using properties of exponents Also consider: • Evaluate powers with negative or zero exponents
Lesson 1: Know and Apply Properties of Exponents
1. Understanding negative exponents 2. Exponents: multiplication, division, and power rules 3. Evaluate expressions using properties of exponents Also consider: • Evaluate powers with negative or zero exponents

Lesson 2: Understand Scientific Notation		1. Convert between standard and scientific notation 2. Scientific notation on calculators Also consider: • Compare numbers written in scientific notation
Lesson 2: Understand Scientific Notation
1. Convert between standard and scientific notation 2. Scientific notation on calculators Also consider: • Compare numbers written in scientific notation

Lesson 3: Compute with Scientific Notation		1. Add and subtract numbers written in scientific notation 2. Multiply numbers written in scientific notation 3. Divide numbers written in scientific notation
Lesson 3: Compute with Scientific Notation
1. Add and subtract numbers written in scientific notation 2. Multiply numbers written in scientific notation 3. Divide numbers written in scientific notation

6	Unit 6 Area and Volume
Module 17 - Analyze Figures to Find Circumference and Area
Lesson 1: Derive and Apply Formulas for Circumference		1. Circumference of circles Also consider: • Perimeter of semicircles and quarter circles
Lesson 1: Derive and Apply Formulas for Circumference
1. Circumference of circles Also consider: • Perimeter of semicircles and quarter circles

Lesson 2: Derive and Apply a Formula for the Area of a Circle		1. Area of circles 2. Circles: word problems Also consider: • Area of semicircles and quarter circles
Lesson 2: Derive and Apply a Formula for the Area of a Circle
1. Area of circles 2. Circles: word problems Also consider: • Area of semicircles and quarter circles

Lesson 3: Areas of Composite Figures		1. Area of compound figures with triangles, semicircles, and quarter circles 2. Area between two shapes
Lesson 3: Areas of Composite Figures
1. Area of compound figures with triangles, semicircles, and quarter circles 2. Area between two shapes
Module 18 - Cross Sections, Surface Area, and Volume
Lesson 1: Describe and Analyze Cross Sections of Solids		1. Cross sections of three-dimensional figures
Lesson 1: Describe and Analyze Cross Sections of Solids
1. Cross sections of three-dimensional figures

Lesson 2: Derive and Apply Formulas for Surface Areas of Cubes and Right Prisms		1. Surface area of cubes and prisms Also consider: • Bases of three-dimensional figures • Nets of three-dimensional figures
Lesson 2: Derive and Apply Formulas for Surface Areas of Cubes and Right Prisms
1. Surface area of cubes and prisms Also consider: • Bases of three-dimensional figures • Nets of three-dimensional figures

Lesson 3: Derive and Apply a Formula for the Volume of a Right Prism		1. Relationship between volume and the area of the base: word problems 2. Volume of cubes and prisms 3. Volume of prisms: advanced
Lesson 3: Derive and Apply a Formula for the Volume of a Right Prism
1. Relationship between volume and the area of the base: word problems 2. Volume of cubes and prisms 3. Volume of prisms: advanced

Lesson 4: Find Volume of Cylinders		1. Volume of cylinders
Lesson 4: Find Volume of Cylinders
1. Volume of cylinders

Lesson 5: Find Volume of Cones and Spheres		1. Volume of cones 2. Volume of spheres
Lesson 5: Find Volume of Cones and Spheres
1. Volume of cones 2. Volume of spheres

Lesson 6: Solve Multi-Step Problems with Surface Area and Volume		1. Relate between volume and surface area 2. Volume of cubes and rectangular prisms: word problems
Lesson 6: Solve Multi-Step Problems with Surface Area and Volume
1. Relate between volume and surface area 2. Volume of cubes and rectangular prisms: word problems

7	Unit 7 Probability
Module 19 - Understand and Apply Experimental Probability
Lesson 1: Understand Probability of an Event		1. Certain, probable, unlikely, impossible 2. Sample spaces of simple events
Lesson 1: Understand Probability of an Event
1. Certain, probable, unlikely, impossible 2. Sample spaces of simple events

Lesson 2: Find Experimental Probability of Simple Events		1. Use collected data to find probabilities and make predictions 2. Experimental probability
Lesson 2: Find Experimental Probability of Simple Events
1. Use collected data to find probabilities and make predictions 2. Experimental probability

Lesson 3: Find Experimental Probability of Compound Events		1. Find the number of outcomes: word problems 2. Find probabilities using two-way frequency tables
Lesson 3: Find Experimental Probability of Compound Events
1. Find the number of outcomes: word problems 2. Find probabilities using two-way frequency tables

Lesson 4: Use Experimental Probability and Proportional Reasoning to Make Predictions		1. Make predictions using experimental probability
Lesson 4: Use Experimental Probability and Proportional Reasoning to Make Predictions
1. Make predictions using experimental probability
Module 20 - Understand and Apply Theoretical Probability
Lesson 1: Find Theoretical Probability of Simple Events		1. Probability of simple events
Lesson 1: Find Theoretical Probability of Simple Events
1. Probability of simple events

Lesson 2: Find Theoretical Probability of Compound Events		1. Sample spaces for compound events 2. Compound events: find the number of outcomes 3. Probability of compound events
Lesson 2: Find Theoretical Probability of Compound Events
1. Sample spaces for compound events 2. Compound events: find the number of outcomes 3. Probability of compound events

Lesson 3: Use Theoretical Probability and Proportional Reasoning to Make Predictions		1. Make predictions using theoretical probability
Lesson 3: Use Theoretical Probability and Proportional Reasoning to Make Predictions
1. Make predictions using theoretical probability

Lesson 4: Conduct Simulations		1. Which simulation represents the situation?
Lesson 4: Conduct Simulations
1. Which simulation represents the situation?

This document includes the IXL® skill alignments to Houghton Mifflin Harcourt's Into Math curriculum. IXL provides skill alignments as a service to teachers, students, and parents. The skill alignments are provided by IXL and are not affiliated with, sponsored by, reviewed, approved or endorsed by Houghton Mifflin Harcourt or any other third party. IXL® and IXL Learning® are registered trademarks of IXL Learning, Inc. All other intellectual property rights (e.g., unregistered and registered trademarks and copyrights) are the property of their respective owners.