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Two Column Proofs
Geometry Triangles
How to organize a two column proof.
statement reason cpctc prove show congruent triangles 
ACT Trigonometry
ACT ACT Math
Short, helpful video on ACT Trigonometry by top ACT prep instructor, Devorah. Videos are produced by leading online education provider, Brightstorm.
Review of some basic trig and miscellaneous question types that always show up once 
The Second Derivative Test for Relative Maximum and Minimum
Calculus Applications of the Derivative
How to show that polynomial functions are continuous functions.

Proving Two Functions are Inverses
Algebra 2 Inverse, Exponential and Logarithmic Functions
How to use algebra to show that two functions are inverses.
proving inverses composition 
Significant Figures
Physics Introduction to Physics
How to find the correct number of figures to show when writing numbers.
significant figures digits rounding 
OneSided Limits
Calculus Limits and Continuity
How to use onesided limits to show that a limit does not exist.
one sided limits two sided limits limit does not exist piecewise functions left hand limit right hand limit table of values numerical approach 
Concavity and Inflection Points
Calculus Applications of the Derivative
How to show that a function is discontinuous at a point x=a because it is not defined there.

Significant Figures
Chemistry Introduction to Chemistry
How to find the correct number of figures to show when writing numbers.
significant figures digits rounding 
Overcoming a failing grade
College counseling How to get better grades
A video that shows you how to overcome a failing grade during freshman or sophomore year. A college admissions counselor shows you how to improve your grade or retake the class, if necessary.
college application applying to college college counseling high school counseling 
Parallel and Skew Lines
Geometry Geometry Building Blocks
How to mark parallel lines, how to show lines are parallel, and how to compare skew and parallel lines.
parallel lines skew lines coplanar collinear 
Area With the Cross Product
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.
cross product magnitude of vectors dot product angle between vectors area parallelogram 
Parallel and Skew Lines
Precalculus Equations of Lines, Parabolas and Circles
How to mark parallel lines, how to show lines are parallel, and how to compare skew and parallel lines.
parallel lines skew lines coplanar collinear 
Pythagorean Theorem Proofs
Geometry Pythagorean Theorem
How to prove the Pythagorean Theorem using Algebra to show the area of the smaller square plus the area of four triangles is equal to the area of the larger square.
right triangle area of a square binomial squared area of a triangle side leg hypotenuse 
Pythagorean Theorem Proofs
Trigonometry Pythagorean Theorem
How to prove the Pythagorean Theorem using Algebra to show the area of the smaller square plus the area of four triangles is equal to the area of the larger square.
right triangle area of a square binomial squared area of a triangle side leg hypotenuse 
How to Complete the Common Application
College counseling Make your college application shine
A video that shows you how to submit writing supplements to individual colleges on the Common Application. A college admissions expert demonstrates how to avoid missing important information.
common application applying to college college counseling high school counseling writing supplement 
How to Complete the UC Application
College counseling Make your college application shine
A video that shows you how to fill out the Scholarships section on the UC Application. A college admissions counselor explains the importance and the requirements for filling out this section.
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Researching Colleges: Things to Consider
College counseling Make your college application shine
A video that shows what to consider when researching colleges to apply to. A college admissions counselors explains the importance of location, cost, size, academics, and much more.
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Researching Colleges: Things to Consider
College counseling Make your college application shine
A video that shows you how to research the tuition and financial aid of colleges. A college admissions officer outlines everything that factors into the cost of attending college.
university of california university of california application uc application college application applying to college college counseling high school counseling academics tuition financial aid 
How to Complete the Arizona State Application
College counseling Make your college application shine
A video that shows you how to fill out the Arizona State University application. A college admissions counselor walks you through the entire ASU application process.
college application applying to college college counseling high school counseling Arizona State University ASU 
How to Complete the MIT Application
College counseling Make your college application shine
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.
college application applying to college college counseling high school counseling MIT Massachusetts Institute of Technology