Study & Productivity

GPA, grades, time management, and study tips.

That 'X min read' tag on articles isn't a guess — it's based on average reading speed research. Here's the actual formula.

Word count is more than an arbitrary rule — it signals depth for readers, search engines, and instructors alike. Here's how it's actually measured.

Grading scales vary by school, but the standard U.S. conversion follows a consistent pattern. Here's how percentage maps to letter grade.

Working backward from a target grade to a required final exam score is simple algebra once you know the formula. Here's how it works.

GPA is a credit-weighted average, not a simple average of grades. Here's the exact formula and how to use it to plan your next semester.

$What Is a Factorial, and What Is It Actually Used For?$

Factorials grow astonishingly fast, and they're the backbone of permutation and combination math. Here's how they work and why they matter.

$How to Calculate Square Roots and Nth Roots by Hand$

Roots are the inverse of exponents. Here's how the nth root formula works, and why even roots of negative numbers aren't real.

$Logarithms Explained Simply (No Confusing Jargon)$

A logarithm just answers 'what power do I need?' Here's the plain-English explanation, plus how log, ln, and custom bases relate.

$How to Solve Any Quadratic Equation With the Quadratic Formula$

The quadratic formula solves any equation in the form ax² + bx + c = 0. Here's how it works, including what happens with complex roots.