Here are short videos that will help you do well on the Keystone Exams. Below is a practice sheet to download and work through some problems on your own, or use the column on the right for online practice with instant answer check from Kahn Academy.

### Algebra I PA Core – Mr. Yaracz

Units and Dimensional Analysis – Overview

Units and Dimensional Analysis – Example-Part One

Units and Dimensional Analysis – Example-Part Two

Interpreting Expressions – Dependant vs. Independant Variables

Writing Equations in One Variable – Example One

Writing Equations in One Variable – Example Two

Factoring Algebraic Expressions

Writing Inequalities in One Variable

Writing Linear Equations in Two Variables

Simplifying Expressions – Monomials

### Algebra I Review – Mr. Yaracz

**Linear Equations**

Linear Equations – Three Forms

Linear Equations – Problem 1 – Scatter Plot Ex. 1

Linear Equations – Problem 2 – System of Equations Ex. 2

Linear Equations – Problem 3 – Slope and Y-Intercept Ex. 3

Linear Equations – Problem 4 – Representing a line Ex. 4

Keystone Algebra Sample Problems

##### Mr. Yaracz’s You Tube Channel

**Practice Problems**

*Module 1*

**1.1 Operations**

- Combining Like Terms
- Exponent Rules
- Exponent Rules Continued
- Simplifying Expressions with Exponents
- Multiplying Polynomials
- Factoring Difference of Squares
- Simplifying Radicals

**1.2 Linear Equations and Systems**

- Writing Expressions
- Linear_Equations
- Linear_Equation_Word_Problems
- Systems of Equations with Elimination Part:1
- Systems of Equations with Elimination
- Systems of Equations with Substitution
- Systems of Equations Word Problems

**1.3 Linear Inequalities and Systems of Inequalities**

*Module 2*

**2.1 Functions and Patterns**

**2.2 Coordinate Geometry**

- Slope of a Line
- Solving_for_the_y-intercept
- Line Graph Intuition
- Graphing Linear Equations
- Graphing Linear Functions to Solve Systems (Includes Module 1 practice.)
- Slope Intercept Form
- Converting between Slope Intercept and Standard Form
- Point Slope Form

**2.3 Probability and Data Analysis**