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 [...]
HSPT Verbal
The HSPT is a high school placement test given to 8th graders who want to be accepted into an Independent or Catholic high school. Click [...]
Multiplying Matrices
Matrices can seem like a fun puzzle to some . . . or a confounding nightmare to others. This guide will help with one of [...]
Law of Sines and Law of Cosines
Law of Sines and Law of Cosines are special trig rules that can be used on non-right (acute or obtuse) triangles. This guide summarizes the [...]
Log Rules
Logs "undo" Exponents, and are thus a vital concept in Math and Science. This guide reviews the 7 Log Rules and how to Expand, Condense, [...]