• #### Area With the Cross Product - Concept

##### Math›Precalculus›Systems of Linear Equations and Matrices
How to show that the magnitude of the cross product of two vectors gives the area of the parallelogram determined by those two vectors.
• #### Invertible Square Matrices and Determinants - Problem 1

##### Math›Precalculus›Systems of Linear Equations and Matrices
How to show that a 3x3 matrix is not invertible by computing its determinant.
• #### One-Sided Limits - Problem 2

##### Math›Calculus›Limits and Continuity
How to show that the limit does not exist by showing that the left-hand limit does not equal the right-hand limit.
• #### ACT vs. SAT

A video that shows you how to decide which standardized test is best for you: the SAT or the ACT. Our college admissions counselor explains which strengths and weaknesses work well with each test.
• #### One-Sided Limits - Problem 1

##### Math›Calculus›Limits and Continuity
How to use one-sided limits to show that the limit exists by showing that the the left-hand limit must equal the right-hand limit.
• #### Overcoming a failing grade

A video that shows you how to overcome a failing grade. A college admissions counselor explains each step you need to take to save your grade or retake the class and improve your GPA.
• #### Invertible Square Matrices and Determinants - Problem 2

##### Math›Precalculus›Systems of Linear Equations and Matrices
How to show that a 3x3 matrix, [2 5 3; -15 10 18; 20 50 30], is not invertible by computing its determinant.
• #### Concept

A video that shows you how to get accommodations through the College Board. A college admissions counselor explains the process of applying for accommodations for taking tests like the SAT or ACT through the College Board.
• #### Concept

A video that shows you everything you need in order to have a complete college application. A college admissions counselor outlines the most important parts of every college application.
• #### How to Talk to Difficult Teachers

A video that shows you how to talk to difficult teachers. A college admissions counselor explains how a difficult teacher may act and what you can do to talk to them about important issues.
• #### Choosing Courses for Senior Year

A video that shows you how to choose classes your senior year in high school. A college admissions counselor explains how to maintain your GPA while choosing classes that are challenging.
• #### How to Prepare

A video that shows you how to plan your college visits. A college admissions expert explains how to schedule campus tours, information sessions, and what else you should do to make the most of your college visits.
• #### Concept

A video that shows you how to fill out an application for the Massachusetts Institute of Technology. A college admissions counselor walks your through each page of the MIT application.
• #### Overcoming a D or an F during Junior Year

A video that shows you how to overcome a failing grade during junior year. A college admissions counselor explains all the steps you need to take to improve your grade or retake the class.
• #### Overcoming a D or an F during Senior Year

A video that shows you how to overcome a failing grade during senior year. A college admissions counselor explains all the steps you need to take to improve your grade or retake the class.
• #### Concept

A video that shows you how to create a final exam schedule. A college admissions counselor explains the benefits to creating a final exam schedule and how early you should start studying.
• #### How to Land the Internship of your Dreams

##### Advice›College counseling›Extracurricular activities and internships
A video that shows you how to land the internship of your dreams. A college admissions counselor explains how to choose, research, and apply to the internship of your dreams.