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Algebra Classes for Adults

40 free algebra classes for adults (18+) on Wunder — short, fact-checked courses and lessons with narration and a quiz. Filter by age — each link is its own page, not a JavaScript toggle.

All agesKids (11)Teens (9)Adults (40)
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Predicting Precipitates in Aqueous Solutions
Learn to predict precipitates by listing dissolved ions, applying solubility rules and exceptions, balancing formulas, and reducing complete ionic equations to the net change.
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The Drake Equation: Counting Civilizations Without False Precision
Use the Drake equation to separate what astronomy measures from what biology and technology still leave uncertain.
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Confounding: When a Third Variable Distorts an Association
Learn to spot confounding, test a third factor with stratified comparisons, and match causal language to the evidence.
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Linear Regression: Read the Model
Read a regression line by separating observed values, predictions, slope, intercept, residuals, and the limits of extrapolation.
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How to Use Kinematic Equations
Choose constant-acceleration equations, keep signs and units consistent, and check whether a motion answer fits the story.
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Dimensional Analysis: Check Physics with Units
Convert units cleanly and use dimensions to catch impossible physics equations before arithmetic hides the mistake.
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Writing Equilibrium Constant Expressions
Turn balanced reversible equations into equilibrium expressions, choose concentrations or partial pressures, omit pure phases, and use Q to predict the direction of change.
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How to Calculate Standard Cell Potential
Use reduction-potential tables to identify cathode and anode, calculate standard cell potential, and know when the Nernst equation is needed.
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Reading Calibration Curves
Learn to read calibration curves, prepare and inspect standards, solve a linear calibration equation, check the working range, and report an unknown with its limits.
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How to Use the Ideal Gas Law
Learn to identify the four gas variables, match units to the gas constant, solve direct and two-state problems, and recognize when the ideal model may fail.
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How to Choose a Statistical Test
Turn a research question into a defensible statistical test by matching variables, group structure, dependence, study design, and uncertainty.
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Great Sandy Desert: Wind, Water, and Country
Read the Great Sandy Desert from above through its linear dunes, ancient river lakes, salt pans, fire scars, and the Canning Stock Route.
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How the Henderson-Hasselbalch Equation Works
Use the Henderson-Hasselbalch equation to connect pKa, conjugate-pair ratios, buffer pH, capacity, and the limits of the approximation.
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How to Solve Thin-Lens Equations
Use signed distances, magnification, and ray diagrams to solve and check thin-lens problems.
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Reading Heating Curves
Read slopes and plateaus on a heating curve, then connect phase changes with pressure, latent heat, and energy equations.
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Balancing Acid-Base Equations
Learn to balance acid-base equations by separating formulas, coefficients, ions, charge, and mole ratios.
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How the Sydney Opera House got its roof
The winning drawing had no buildable roof on it, and the state started pouring concrete anyway. What followed was six years of failed geometries, one sphere, 30,000 hand-written equations, 1,056,006 tiles — and an architect who walked out i
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How to convert units with dimensional analysis
Use units as algebra to convert chemistry quantities and catch mismatched dimensions.
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How to solve systems of equations
Translate contexts, choose substitution or elimination, interpret intersections, and verify exact solutions under test conditions.
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How to write a net ionic equation
Strip spectator ions from a balanced aqueous reaction while preserving states, atoms, charge, and the chemical change.
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Stoichiometry from equation to yield
Use balanced equations, mole ratios, limiting reactants, molarity, and yield to solve chemistry problems.
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Balancing redox equations
Use the half-reaction method to balance atoms, charge, electrons, and solution conditions in oxidation–reduction equations.
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Why Is Doomscrolling So Hard to Stop?
See how threat attention, uncertain updates, variable rewards, social monitoring, and missing endpoints keep a feed alive.
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Why do we get hay fever?
Trace pollen from silent IgE sensitization through early mast-cell alarms, late nasal inflammation, variable exposure, and mechanism-specific treatment.
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Weather Systems for Agriculture
Weather for people who grow things, taught around one shift in mindset: a farm doesn't respond to 'weather' in the abstract — it responds to a few measurable variables. Learn to count heat with growin
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Energy storage and grid modernization
The power grid must match supply to demand every single instant — that is its unforgiving rule. Cheap solar and wind broke the old way of keeping that balance by being variable, and energy storage plu
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Sous vide thermal physics and precision technique
Sous vide isn't a gadget — it's the decision to control the one variable every other method leaves to luck: final temperature. Learn the protein science of why it works, how time and temperature becom
Renewable Energy Systems and Sustainability
Cut through the noise around clean energy. This course treats decarbonisation as what it actually is — a systems problem of matching variable supply to constant demand, across time and materials — not
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Tea: The World in a Cup
One plant, six kinds of tea, five thousand years of history. Understand how a single variable — oxidation — turns the same leaf into green, oolong, or black; learn terroir, the truth about caffeine, h
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From Pole to Plug: How Power Reaches Your Home
The wire outside your window carries thousands of volts; your socket delivers 120. One equation — P = I²R — explains that gap, and everything between: the staircase of voltage, the radial feeder that
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Calculus III: Multivariable
Extend calculus into three dimensions and beyond. You'll work with partial derivatives, multiple integrals, and vector fields used across physics and engineering.
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Differential Equations
Learn the equations that describe change over time. You'll solve the main types of differential equations and use them to model motion, growth, and oscillation.
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How Encryption Works
Understand the math that keeps secrets safe. You'll grasp keys, public-key cryptography, and how encryption protects messages, payments, and the web without needing the equations.
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Quantum Mechanics Without the Math
Build real intuition for the quantum world using experiments instead of equations. You'll understand superposition, entanglement, and measurement well enough to see through the hype.
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General Chemistry I
Begin chemistry the way a college first term does: atoms, the periodic table, bonds, moles, balanced equations, and predicting what reacts.
Algebra Refresher
Rebuild the algebra skills most adults have let slip. You'll solve equations, work with exponents, and read and manipulate the formulas that show up everywhere.
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Precalculus
Bridge algebra and calculus by mastering functions. You'll graph and transform functions, handle logarithms and exponentials, and be ready for a first calculus
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Programming I with Python
Write your first real programs in Python. You'll understand variables, loops, and functions and be able to build small scripts that solve everyday problems.
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Linear Algebra
Master the math of vectors, matrices, and linear systems that powers modern data and graphics. You'll solve systems, multiply matrices, and understand eigenvalues.
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Rockets: How They Work
How rockets actually work — from Newton's third law and the tyranny of the rocket equation to propellants, staging, bell nozzles, orbital mechanics, and the century of engineering from Goddard to reusable boosters.

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