Phi Learning — WorldWiseKids
Concept Library

Study Concepts

Search and filter clear explanations across everything we teach — reading, math, physics, study skills, and hands-on outdoor and kitchen projects.

Showing 7 concepts in Math.

MathFoundations

Pre-Algebra

The bridge from arithmetic to algebra: working confidently with fractions, decimals, percents, and negative numbers, mastering the order of operations, and meeting the first variables.

pre-algebrafractionsintegersorder of operationspemdas
MathCore

Algebra 1

The core language of algebra: solving linear equations and inequalities, working with variables and expressions, and graphing lines.

algebra 1linear equationsslopegraphingvariables
MathCore

Geometry

The study of shapes, sizes, angles, and space — lines, triangles, and circles, area and volume, and logical proofs.

geometryshapesanglesproofsareapythagorean theorem
MathAdvanced

Algebra 2

Algebra taken further: quadratic, polynomial, exponential, and logarithmic functions, plus more advanced equation-solving and graphing.

algebra 2quadraticsfunctionsexponentslogarithmspolynomials
MathAdvanced

Trigonometry

The mathematics of triangles and angles: the sine, cosine, and tangent ratios, the unit circle, and periodic (wave) functions.

trigonometrysinecosinetangentunit circlesohcahtoa
MathPre-College

Pre-Calculus

The preparation for calculus: deep work with functions and their graphs, advanced trigonometry, and a first look at limits.

pre-calculusfunctionslimitsgraphssequences
MathPre-College

Calculus

The mathematics of change: derivatives (instantaneous rates of change) and integrals (accumulated totals), both built on the idea of a limit.

calculusderivativesintegralslimitsrates of change