Add checklist folder with TRACKER.md for math study progress

checklist/TRACKER.MD

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+# Tracker of the Math Courses
+
+Please use this page to track the progress of your math studies.
+
+> [!TIP]
+> To mark a lesson as completed, just put x character between the square brackets in the following checklists.
+
+- [x] Example of completed task
+
+
+<details>
+<summary>Arithmetic (click to open the list)</summary>
+
+[Course page](https://ossu.dev/precollege-math/coursepages/arithmetic/ "Course page")
+
+- [ ] Class 1: An Introduction, Course Content, and Staying Organized
+- [ ] Take Screen Shots of All Class Problems (not a required video)
+- [ ] Class 2: Introduction to Numbers
+- [ ] Class 3: Adding Whole Numbers
+- [ ] Class 4: Subtracting Whole Numbers.
+- [ ] Class 5: Memorizing Products
+- [ ] Class 6: Multiplying Multi-Digit Whole Numbers
+- [ ] Class 7: Dividing Whole Numbers-Part I
+- [ ] Class 8: Dividing Whole Numbers-Part II
+- [ ] Class 9: Review for Test I
+- [ ] Class 10: Test I
+- [ ] Class 11: Fractions and Fraction Equivalency
+- [ ] Classs 12: Adding and Subtracting Fractions
+- [ ] Class 13: Multiplying and Dividing Fractions
+- [ ] Class 14: Adding and Subtracting Mixed Numbers
+- [ ] Class 15: Multiplying and Dividing Mixed Numbers-
+- [ ] Class 16: Review for Test II
+- [ ] Class 17: Test II
+- [ ] Class 18: Introduction to Decimals
+- [ ] Class 19: Operations with Decimals Part I
+- [ ] Class 20: Operations with Decimals (Part II)
+- [ ] Class 21: Percents and Converting between All Three Forms of fractions
+- [ ] Class 22: Applications of Percents
+- [ ] Class 23: The Order of Operations Agreement and Geometric Formulas
+- [ ] Class 24: Further Applications of the Order of Operations Agreement
+- [ ] Class 25: Ratios and Rates
+- [ ] Class 26: Proportions
+- [ ] Class 27: Rounding
+- [ ] Class 28: Basic Statistics and Graphs
+- [ ] Class 29: Review for Test III
+- [ ] Class 30: Test III
+- [ ] Class 31: Review for Test IV
+- [ ] Class 32: Test IV
+- [ ] Class 33: A Few More Things
+- [ ] Class 34: A Few More Things (Part II)
+- [ ] Class 35: Multistep Word Problems
+- [ ] Class 36: Competitive Tests
+- [ ] Class 37: Review for the Final Exam
+- [ ] Class 38: The Final Exam
+- [ ] Class 39: Calculating Your Grade for the Course
+</details>
+
+<details>
+<summary>Pre-algebra (click to open the list)</summary>
+
+[Course link](https://ossu.dev/precollege-math/coursepages/pre-algebra/ "Course link")
+
+- [ ] Class 1: An Introduction, Staying Organized, and Course Content
+- [ ] Class 2: Negative Numbers
+- [ ] Class 3: Negative Fractions
+- [ ] Class 4: Algebraic Expressions.
+- [ ] Class 5: Algebraic Fractions
+- [ ] Class 6: Review for Test 1
+- [ ] Class 7: Test 1
+- [ ] Class 8: One-Step Equations
+- [ ] Class 9: Two-Step Equations
+- [ ] Class 10: Three-Step Equations
+- [ ] Class 11: Equations Requiring Four or More Steps
+- [ ] Class 12: Review for Test 2
+- [ ] Class 13: Test 2
+- [ ] Class 14: Equations with Variables on Both Sides
+- [ ] Class 15: Evaluating Algebraic Expressions (Part I)
+- [ ] Class 16: Evaluating Algebraic Expressions (Part II)
+- [ ] Class 17: Equations with Parentheses
+- [ ] Class 18: Review for Test 3
+- [ ] Class 19: Test 3
+- [ ] Class 20: Inequalities and Equations with Decimals
+- [ ] Class 21: Applications of Algebra (Part I)
+- [ ] Class 22: Applications of Algebra (Part II)
+- [ ] Class 23: Graphing Linear Equations and Inequalities
+- [ ] Class 24: Review for Test 4
+- [ ] Class 25: Test 4.
+- [ ] Class 26: Review for the Final Test
+- [ ] Class 27: The Final Test
+- [ ] Class 28: Calculating Your Grade for the Course
+</details>
+
+<details>
+<summary>Algebra 1 (click to open the list)</summary>
+
+[Course link](https://ossu.dev/precollege-math/coursepages/algebra-1/ "Course link")
+
+- [ ] Class 1: Introduction, Staying Organized, and Course Content.
+- [ ] Class 2: Polynomials.
+- [ ] Class 3: Multiplying Binomials.
+- [ ] Class 4: Factoring Algebraic Expressions (Part I)
+- [ ] Class 5: Factoring Algebraic Expressions (Part II).
+- [ ] Class 6: Factoring Algebraic Expressions (Part III).
+- [ ] Class 7: Factoring Algebraic Expressions (Part IV).
+- [ ] Class 8: Review for Test I.
+- [ ] Class 9: Test I
+- [ ] Class 10: Simplifying Algebraic Fractions-
+- [ ] Class 11: Multiplying and Dividing Algebraic Fractions
+- [ ] Class 12: Adding and Subtracting Algebraic Fractions.
+- [ ] Class 13: Complex Fractions.
+- [ ] Answers for Problems that Were Skipped in the Complex Fractions Class (not a required video)
+- [ ] Class 14: Simplifying Expressions with Square Roots (Part I ).
+- [ ] Class 15: Simplifying Expressions with Square Roots (Part II).
+- [ ] Class 16: Review for Test II
+- [ ] Class 17: Test II
+- [ ] Class 18: Solving Quadratic Equations by Factoring.
+- [ ] Class 19: Solving Equations with Squares.
+- [ ] Class 20: Solving Equations with Fractions.
+- [ ] Class 21: Solving More Equations by Factoring
+- [ ] Class 22: Solving Equations with Square Roots.
+- [ ] Class 23: Review for Test III
+- [ ] Class 24: Test III
+- [ ] Class 25: Solving Systems of Equations.
+- [ ] Class 26: The Three Forms of Linear Equations and Finding Slope
+- [ ] Class 27: Graphing Linear Equations
+- [ ] Class 28: Additional Problems on Linear Equations and their Graphs
+- [ ] Class 29: Applications of Algebra (Part I).
+- [ ] Class 30: Applications of Algebra (Part II)
+- [ ] Class 31: Review for Test IV
+- [ ] Class 32: Test IV
+- [ ] Class 33: Review for the Final Test (Part I)
+- [ ] Class 34: The Final Test (Part I)
+- [ ] Class 35: Review for the Final Test (Part II)
+- [ ] Class 36: The Final Test (Part II)
+- [ ] Class 37: Calculating Your Final Grade for the Course
+</details>
+
+<details>
+<summary>Geometry (click to open the list)</summary>
+
+[Course link](https://ossu.dev/precollege-math/coursepages/geometry/ "Course link")
+
+- [ ] Class 1: An Introduction, Staying Organized, and Course Content
+- [ ] Class 2: Fundamental Geometry (Part I)
+- [ ] Class 3: Fundamental Geometry (Part II)
+- [ ] Class 4: Fundamental Geometry (Part III)
+- [ ] Class 5: Inductive and Deductive Reasoning
+- [ ] Class 6: Proofs and Properties of Equality and Congruence (Part I)
+- [ ] Class 7: Proofs and Properties of Equality and Congruence (Part II)
+- [ ] Class 8: Proofs and Properties of Equality and Congruence (Part III)
+- [ ] Class 9: Review for Test I
+- [ ] Class 10: Test I
+- [ ] Class 11: Angles Formed by Transversals
+- [ ] Class 12: Triangles (The Pythagorean Theorem and the Triangle Sum Theorem).
+- [ ] Class 13: Triangle Congruence Postulates and Theorems.
+- [ ] Class 14: Applications of Triangle Congruence and More Triangle Theorems
+- [ ] Class 15: The Distance Formula and the Midpoint in Two Dimensions
+- [ ] Class 16: Coordinate Proofs and Bisector Theorems
+- [ ] Class 17: Review for Test 2
+- [ ] Class 18: Test 2
+- [ ] Class 19: Points of Concurrency Generated by Triangles
+- [ ] Class 20: Review on Linear Equations, Linear Graphs, and Systems of Equations.
+- [ ] Class 21: Finding the Coordinates of Points of Concurrency Generated by Triangles
+- [ ] Class 22: Ratios, Proportions, and Triangle Inequality Theorems
+- [ ] Class 23: Similar Polygons and Similarity Postulates and Theorems
+- [ ] Class 24: Proportionality Theorems, Transformations, and More on Similar Polygons
+- [ ] Class 25: Review for Test 3
+- [ ] Class 26: Test 3
+- [ ] Class 27: Right Triangles (Part I)
+- [ ] Class 28: Right Triangles (Part II)
+- [ ] Calss 29: Special Quadrilaterals (Part I) and Angles of Polygons
+- [ ] Class 30: Special Quadrilaterals (Part II)
+- [ ] Class 31: Special Quadrilaterals (Part III)
+- [ ] Class 32: Review for Test 4
+- [ ] Class 33: Test 4
+- [ ] Class 34: Circles (Part I).
+- [ ] Class 35: Circles (Part II)
+- [ ] Class 36: Circles (Part III)
+- [ ] Class 37: Review for Test 5
+- [ ] Class 38: Test 5
+- [ ] Class 39: Area (Part I)
+- [ ] Class 40: Area (Part II)
+- [ ] Class 41: Area (Part III)
+- [ ] Class 42: Volume
+- [ ] Class 43: Paragraph Proofs and Flowchart Proofs
+- [ ] Class 44: Review for Test 6
+- [ ] Class 45: Test 6
+- [ ] Class 46: Review for Part I of the Final Test
+- [ ] Class 47: The Final Test (Part I)
+- [ ] Class 48: Review for Part II of the Final Test
+- [ ] Class 49: The Final Test (Part II)
+- [ ] Class 50: Calculating Your Final Grade
+</details>
+
+<details>
+<summary>Algebra 2 (click to open the list)</summary>
+
+[Course link](https://ossu.dev/precollege-math/coursepages/algebra-2/ "Course link")
+
+- [ ] Class 1: An Introduction, Staying Organized, and Course Content
+- [ ] Class 2: Review and Expanding on Various Topics
+- [ ] Class 3: Solving Systems of Three Equations
+- [ ] Class 4: Absolute Value Equations and Inequalities
+- [ ] Class 5: Roots (Part I)
+- [ ] Class 6: Roots (Part II)
+- [ ] Class 7: Roots (Part III)
+- [ ] Class 8: Roots (Part IV)
+- [ ] Class 9: Solving Quadratic Equations by Completing the Square (Part I)
+- [ ] Class 10: Solving Quadratic Equations by Completing the Square(Part II)
+- [ ] Class 11: Solving Quadratic Equations with the Quadratic Formula
+- [ ] Class 12: Review for Test I
+- [ ] Class 13: Test I
+- [ ] Class 14: Graphing Quadratic Expressions
+- [ ] Class 15: Graphing Quadratic Expressions (Part II)
+- [ ] Class 16: Graphing Quadratic Expressions (Part III)
+- [ ] Class 17: Graphing Quadratic Expressions (Part IV)
+- [ ] Class 18: Graphing Quadratic Expressions (Part V)
+- [ ] Class 19: Graphing Quadratic Expressions (Part VI)
+- [ ] Class 20: Graphing Quadratic Expressions (Part VII)
+- [ ] Class 21: Finding Quadratic Equations and Counting X-Intercepts
+- [ ] Class 22: Converting between the Three Forms of a Quadratic Expression
+- [ ] Class 23: Review for Test II
+- [ ] Class 24: Test II
+- [ ] Class 25: The Exponent Rules (Part I)
+- [ ] Class 26: The Exponent Rules (Part II)
+- [ ] Class 27: The Exponent Rules (Part III)
+- [ ] Class 28: The Exponent Rules (Part IV)
+- [ ] Class 29: Exponential Equations and an Introduction to Logarithms
+- [ ] Class 30: Exponential Equations and an Intro to Logarithms (Part II)
+- [ ] Class 31: Exponential Equations and Logarithmic Equations
+- [ ] Class 32: More Logarithmic Equations and Properties of Logarithms
+- [ ] Class 33: More Complicated Logarithmic Equations
+- [ ] Class 34: More Complicated Logarithmic Equations (Part II)
+- [ ] Class 35: More Complicated Logarithmic Equations (Part III)
+- [ ] Class 36: Review for Test III
+- [ ] Class 37: Test III
+- [ ] Class 38: Transformations and the Library of Relations
+- [ ] Class 39: Transformations and the Library of Relations (Part II)
+- [ ] Class 40: Transformations and the Library of Relations (Part III)
+- [ ] Class 41: Transformations and the Library of Relations (Part IV)
+- [ ] Class 42: Transformations and the Library of Relations (Part V)
+- [ ] Class 43: Transformations and the Library of Relations (Part VI)
+- [ ] Class 44: Functions and Function Notation
+- [ ] Class 45: Functions and Function Notation (Part II)
+- [ ] Class 46: Functions and Function Notation (Part III)
+- [ ] Class 47: Functions and Function Notation (Part IV)
+- [ ] Class 48: Functions and Function Notation (Part V)
+- [ ] Class 49: Applications of Algebra (Part I)
+- [ ] Class 50: Applications of Algebra (Part II)
+- [ ] Class 51: Applications of Algebra (Part III)
+- [ ] Class 52: Review for Test IV
+- [ ] Class 53: Test IV
+- [ ] Class 54: Review for the Final Test
+- [ ] Class 55: The Final Test
+- [ ] Class 56: Calculating Your Course Grade
+</details>
+
+<details>
+<summary>Trigonometry (click to open the list)</summary>
+
+[Course link](https://ossu.dev/precollege-math/coursepages/trigonometry/ "Course link")
+
+- [ ] Class 1: An Introduction, Staying Organized, and the Course Content
+- [ ] Class 2: The Six Basic Trigonometric Functions
+- [ ] Class 3: Trigonometric Expressions with Angle Measures Greater than 90 Degrees
+- [ ] Class 4: Continued Exploration of the Six Basic Trigonometric Functions
+- [ ] Class 5: Continued Exploration of the Six Basic Trigonometric Functions (II)
+- [ ] Class 6: Using the Pythagorean Theorem to Find the Six Trigonometric Ratios
+- [ ] Class 7: Review for Test I
+- [ ] Class 8: Test I
+- [ ] Class 9: The Basic Trigonometric Identities
+- [ ] Class 10: Proving Equations Using the Basic Trigonometric Identities
+- [ ] Class 11: Trigonometric Equations
+- [ ] Class 12: Trigonometric Equations (Part II)
+- [ ] Class 13: The Sum and Difference Identities
+- [ ] Class 14: The Double Angle Identities
+- [ ] Class 15: The Half Angle Identities and More Double Angle Problems
+- [ ] Class 16: More Identities
+- [ ] Class 17: Review for Test II
+- [ ] Class 18: Test II
+- [ ] Class 19: Transforming the Graphs of Trigonometric Functions
+- [ ] Class 20: Inverse Trigonometric Functions and Writing the Equations of Graphs
+- [ ] Class 21: The Law of Sines (AAS, ASA)
+- [ ] Class 22: The Law of Sines (Part II), the Ambiguous Case (SSA)
+- [ ] Class 23: The Law of Cosines (SAS, SSS)
+- [ ] Class 24: Review for Test III
+- [ ] Class 25: Test III
+- [ ] Class 26: The Radian Measure of an Angle
+- [ ] Class 27: Applications of Radian Units for the Measures of Angles
+- [ ] Class 28: Applications of Trigonometry
+- [ ] Class 29: Evaluating Composite Trigonometric Functions
+- [ ] Class 30: Evaluating Composite Trigonometric Functions (Part II)
+- [ ] Class 31: A Few More Things
+- [ ] Class 32: Review for Test IV
+- [ ] Class 33: Test IV
+- [ ] Class 34: Review for the Final Test
+- [ ] Class 35: The Final Test
+- [ ] Class 36: Calculating Your Course Grade
+</details>
+
+<details>
+<summary>Precalculus (click to open the list)</summary>
+
+[Course link](https://ossu.dev/precollege-math/coursepages/precalculus/ "Course link")
+
+- [ ] Class 1: An Introduction, Staying Organized, and Course Content
+- [ ] Class 2: Polynomials (Part I) Review
+- [ ] Class 3: Polynomials (Part II), Long Division
+- [ ] Class 4: Polynomials (Part III), Long Division and Synthetic Division
+- [ ] Class 5: Polynomials (Part IV) Polynomial Equations with Degree Three or Greater
+- [ ] Class 6: Polynomials (Part V), Irrational or Complex Zeros, Factoring Methods
+- [ ] Class 7: Polynomials (Part VI), Graphs and Finding Equations Given Zeros
+- [ ] Class 8: Rational Functions
+- [ ] Class 9: Rational Functions (Part II)
+- [ ] Class 10: Solving Nonlinear Inequalities with Polynomial Expressions
+- [ ] Class 11: Solving Nonlinear Inequalities with Rational Expressions
+- [ ] Class 12: Review for Test I
+- [ ] Class 13: Test I
+- [ ] Class 14: The Conics (Part I)
+- [ ] Class 15: The Conics (Part II)
+- [ ] Class 16: The Conics (Part III)
+- [ ] Class 17: Sequences and Series
+- [ ] Class 18: Sequences and Series (Part II)
+- [ ] Class 19: Sequences and Series (Part III)
+- [ ] Class 20: Counting
+- [ ] Class 21: Counting (Part II)
+- [ ] Class 22: Probability
+- [ ] Class 23: The Binomial Theorem
+- [ ] Class 24: Review for Test II
+- [ ] Class 25: Test II
+- [ ] Class 26: Trigonometry Review
+- [ ] Class 27: Polar Coordinates
+- [ ] Class 28: Graphing Polar Equations and Converting to Rectangular Form
+- [ ] Class 29: Parametric Equations and Their Graphs
+- [ ] Class 30: Review on Functions and Function Notation
+- [ ] Class 31: Reflection, Symmetry, and Inversion
+- [ ] Class 32: Symmetric Functions and Review on Exponents and Logarithms
+- [ ] Class 33: Review for Test III
+- [ ] Class 34: Test III
+- [ ] Class 35: Inverse Functions
+- [ ] Class 36: Inverse Functions (Part II)
+- [ ] Class 37: Becoming More Fluent with Function Notation and Reviewing Curricula
+- [ ] Class 38: Average
+- [ ] Class 39: The Complex Plane and Graphing Polar Equations with Radian Units
+- [ ] Class 40: Applications
+- [ ] Class 41: Applications (Part II)
+- [ ] Class 42: Review for Test IV
+- [ ] Class 43: Test IV
+- [ ] Class 44: Review for the First Half of the Final Test
+- [ ] Class 45: The First Half of the Final Test
+- [ ] Class 46: Review for the Second Half of the Final Test
+- [ ] Class 47: The Second Half of the Final Test
+- [ ] Class 48: Calculating Your Course Grade
+</details>
+
+