Functions: One-to-One and Onto
When learning about the behavior of graphs, the terminology can be confusing. Function? One-to-One? Onto? Use this summary to help keep it all straight. Click [...]
Arithmetic & Geometric Sequences
Many standardized tests like the ACT, SAT, GRE, and GMAT include problems related to arithmetic and geometric sequences. The differences between these types of sequences, [...]
GRE Guide and Resources
The GRE is increasingly being accepted by graduate and law schools (in place of the GMAT and LSAT). Check here and with the specific institutions [...]
Graphing Rational Polynomial Functions: Asymptotes and Holes
In order to understand the behavior of the graphs of rational polynomials, you need to consider the asymptotes and holes. This guide will help you [...]
Computational Word Problems
Many standardized tests like the HSPT, ISEE, ACT, and SAT will ask you to perform basic arithmetic computations. You will not see any variables in [...]
Central Angle, Arc Length, and Sector Area of Circles
Many standardized tests like the ACT, SAT, GRE, and GMAT ask questions related to the central angle, arc length, and sector area of circles. Rather [...]
Verifying Trigonometric Identities
Lessons in Algebra 2, Trigonometry, and Pre-Calculus courses often involve verifying trigonometric identities. We are so accustomed to solving equations that "verifying" or "providing" [...]
Subject Verb Agreement
Verbs should agree with the subject. As simple as this sounds, it can often be confusing. This guide will help! Click here for the guide [...]
Lenses and Mirrors
Lenses and Mirrors refract rays to form an image. Keeping track of whether this image is inverted or upright, magnified or shrunk, etc can be [...]
Hardy-Weinberg Equilibrium
Students in Biology class focus on learning how to use the Hardy-Weinberg Equations. The Hardy-Weinberg Equilibrium Principle states that allele and genotype frequencies in a [...]
