Study guides

AP Biology

Fourteen substantial lessons that turn biological facts into explanations, experimental reasoning, evolutionary forces, Hardy-Weinberg calculations and energy flow.

AP Calculus AB

Fifteen lessons on the meaning behind derivatives, integrals, motion, shape, approximation and written justifications.

AP English Language and Composition

Fourteen lessons on rhetorical situation, thesis, evidence, commentary, synthesis, argument and sophistication, with close readings of two Lincoln speeches.

AP English Literature and Composition

Fourteen lessons on titles, syntax, thesis precision, minor characters, structure, figurative language, memory, narrators, close readings of Shakespeare, Dickinson and Austen, and interpretation.

AP Human Geography

Fourteen lessons that turn geographic vocabulary into scale, models, data definitions, fertility and age-structure reasoning.

AP Psychology

Fourteen connected lessons on research reasoning, learning, memory, the synapse, development designs, anxiety and psychological argumentation.

AP Statistics

Fourteen connected lessons on design, variation and inference, with explainable visual tools.

AP United States History

Fourteen lessons on writing precise historical claims, from Native adaptation to the Cold War, emancipation and civil rights.

AP World History: Modern

Fourteen lessons on turning world history into specific, period-correct explanations, from Berlin and Meiji Japan to Versailles and the Universal Declaration.

UCAS Undergraduate Application

Ten lessons on the UCAS undergraduate route for 2027 entry: calendar, deadlines, five choices, the three-question personal statement, evidence, the reference and what happens after you apply.

UK Admissions Beyond Standard UCAS

Ten lessons on the extra steps for Oxford and Cambridge, medicine and conservatoires for 2027 entry: tests, forms, interviews, the UCAT, UCAS Conservatoires and a combined plan.

Common App in depth

Ten lessons on the essay, activities, context, recommenders, FERPA and the checks that turn drafts into submitted applications.

Coalition with Scoir

Ten lessons on the two-part application, participating schools, school connections, portfolios and recommendation delivery.

AP Chemistry

Ten lessons that follow the nine course units and the exam format, with calculations, particle-level explanations and written arguments.

Intermediate and Advanced Accounting

Seventeen US GAAP lessons from intermediate topics (revenue, inventory, leases, taxes, pensions, EPS) through advanced topics: business combinations, consolidation, equity method, foreign currency, hedging, partnerships and not-for-profits, and the conceptual framework.

Algorithms

13 lessons on recurrences, dynamic programming, greedy methods, graphs, reductions and amortized analysis.

Biochemistry

Ten lessons linking molecular state, assay calculations, enzyme kinetics and energy accounting, with two interactive visuals each.

Business Law

Twelve lessons on UCC Article 2 sales, common law contracts, agency, business entities, torts and employment basics.

Corporate Finance

13 lessons on cash flow, discount rates, capital structure, payout and terminal value assumptions.

Differential Equations

Ten lessons connecting ODE rules, methods, approximation, forcing and systems, each with paired explorations.

Econometrics II: Causal Inference

13 lessons on identification, omitted variables, controls, difference-in-differences, regression discontinuity, instruments and uncertainty.

Entrepreneurship

Ten lessons on evaluating opportunities, talking to customers, building a model, checking unit economics, choosing financing and a legal entity, reaching customers and pitching.

Ethics

Ten lessons on normative theories, metaethics and applied arguments: consequentialism, Kantian ethics, virtue ethics, contractualism, double effect, realism and its rivals, the is-ought gap, relativism and the duty to aid.

Introductory Accounting

Financial and managerial accounting through statements, adjusting entries, cost behavior, CVP and budgets. Ten lessons connect recognition, calculations and decisions.

Linear Algebra

Ten lessons connecting systems, spaces and matrix geometry, with two case-switching explorations per lesson.

Organic Chemistry II

13 lessons on spectroscopy, mechanism bookkeeping, carbonyl chemistry, aromatic reactivity and stereochemistry.

Private Equity

Ten lessons on LBO mechanics, leverage, fund economics, carry and hurdles, value creation, exits and performance measurement.

Quantum Mechanics II

13 lessons on matrix elements, perturbation theory, angular momentum, identical particles and the variational method.

Venture Capital

Ten lessons connecting fund structure, financing terms, cap tables and investor returns through original cases and explicit assumptions.

Introduction to International Relations

Ten lessons on why states fight, cooperate and disagree about the rules: theory, bargaining, institutions, trade, climate and the people left out of state-centred accounts.

CAIA

Sixteen lessons on alternative-investment models, liquidity, hedging, due diligence and original mixed portfolio practice.

Gaokao

Fifteen lessons on China's National College Entrance Examination: who runs it, the timetable, subject models, converted grades, bonus points, special channels, application choices and exam rules, with score arithmetic, combination counts, rank and position, the Strong Base Plan's 85 percent floor and a guide to reading official notices.

GMAT

Sixteen lessons on quantitative models, data sufficiency, Data Insights, argument evaluation and mixed original practice.

GRE General Test

Sixteen lessons on verbal logic, quantitative models, supported writing and mixed original practice.

LSAT

Sixteen lessons on assumptions, conditional logic, passage voices, parallel flaws and mixed original reasoning practice.

MCAT

Sixteen lessons on passage reasoning, science models, genetics, data interpretation, psychology measures and mixed original practice.

SIE

Sixteen lessons on market terminology, fund values, risk and original mixed practice.

Series 7

Sixteen lessons on options, convertible bonds, fund costs and original mixed product practice.

US Uniform CPA Examination

Sixteen lessons on exam planning, audit models, reconciliations, inventory, depreciation, controls and original mixed practice.

IB Biology

Seventeen lessons on molecules, cells, metabolism, genetics, evolution, physiology, ecology and the scientific investigation for the current IB Biology course.

IB Business Management

Sixteen lessons on quantitative tools, ratios, decision-making, people, marketing, operations and change for the Business Management course.

IB Chemistry

Seventeen lessons across structure and reactivity: particles, the mole, bonding, energetics, rates, equilibrium, acids, redox, organic reactions, titration and the scientific investigation.

IB English A: Language and Literature

Sixteen lessons on how texts of many types make meaning, rhetoric, informal registers, Paper 1 technique, literary texts, genre, comparing works and linking texts to larger questions.

IB English A: Literature

Sixteen lessons on reading unseen passages, tone, structure, character, sound, comparing works, writing the HL essay and preparing the individual oral.

IB History

Sixteen lessons on source evaluation, essay argument, causation, perspective, exam planning and the historical investigation, with the course change flagged.

IB Physics

Seventeen lessons on kinematics, forces, energy, thermal physics, circuits, oscillations, waves, fields, radioactive decay and the scientific investigation for the current IB Physics course.

IB Spanish B

Sixteen lessons on writing for audience, key grammar contrasts, pronouns, si clauses, opinions, listening and reading strategy, and the individual oral.

French for Beginners

Ten text-only beginner lessons: pronunciation with IPA, greetings, noun gender and articles, subjects, present verbs, questions, negation and a short reading. No audio.

German for Beginners

Ten introductory lessons on Standard German: pronunciation in text and IPA, gender and plurals, present verbs, four cases, word order, questions, negation and a short supported reading. No audio.

Modern Standard Arabic for Beginners

Ten beginner lessons on Modern Standard Arabic: reading right to left, the 28 letters and how they connect, short and long vowels, transliteration, greetings, simple sentences without 'is', numbers and a first short conversation. No audio.

Latin for Beginners

Ten lessons from pronunciation to reading a short Latin sentence: sounds and stress, case endings, three noun patterns, adjectives, verbs in the present, imperfect and perfect, and a glossed line of Caesar. No audio.

Mandarin Chinese for Beginners

Ten beginner lessons on Standard Chinese (Mandarin): pinyin with tone marks, the four tones and tone changes, simplified characters and stroke order, greetings, basic sentences, numbers, question words and a first short conversation.

ACT

Sixteen lessons on reading evidence, English conventions and quantitative models, with original practice.

IELTS Academic

Sixteen text-based lessons on grammar, reading, task-specific writing and listening/speaking preparation.

SAT

Sixteen lessons on reading evidence, English conventions and quantitative models, with original practice.

TOEFL iBT

Sixteen text-based lessons on grammar, reading, task-specific writing and listening/speaking preparation.

AP Physics 1

Ten lessons that follow the eight course units and the exam skills: kinematics, forces, energy, momentum, rotation, oscillations, fluids and written justification.

AP Macroeconomics

Ten lessons that follow the six course units: economic concepts, indicators, AD-AS, money and banking, long-run policy and the open economy, with graph and free-response habits.

AP Computer Science A

Ten lessons that follow the four course units in Java: objects and methods, selection and iteration, class creation and data collections, with tracing and free-response habits.

AP Environmental Science

Ten lessons that follow the nine course units: ecosystems, biodiversity, populations, earth systems, land and water, energy, pollution and global change, with data and free-response habits.

AP Microeconomics

Ten lessons that follow the six course units: decisions, supply and demand, costs, market structures, factor markets and market failure, with graph and free-response habits.

AP Calculus BC

Twelve lessons covering the ten BC units: limits, derivative applications, integration techniques, improper integrals, differential equations, parametric, polar and vector motion, and the full series toolkit.

AP Precalculus

Ten lessons following Units 1 to 3 of the course: polynomial and rational functions, exponentials and logarithms, trigonometric and polar functions, plus modeling.

AP Physics C: Mechanics

Ten calculus-based lessons across the seven units: kinematics, forces, work and energy, momentum, rotation and oscillations, with derivations and graph reasoning.

Applying to the University of California

11 lessons on UC first-year admission: nine campuses, A-G courses, GPA minimums, the top 9 percent path, personal insight questions, activities, exam credit, English proficiency, paying for UC and the fall 2027 timeline.

AP Physics C: Electricity and Magnetism

Ten calculus-based lessons across the six units: fields and Gauss's law, potential, conductors and capacitors, circuits, magnetism and induction, with interactive explorers.

AP Physics 2: Algebra-Based

Eleven algebra-based lessons across the seven units: thermodynamics, electric force and field, circuits, magnetism, optics, waves and modern physics, with interactive explorers.

AP Comparative Government and Politics

Twelve lessons across the five units and six countries: regimes, legitimacy, institutions, culture, electoral and party systems, development and data skills, with interactive explorers.

AP European History

11 lessons across the nine units from the Renaissance to the Cold War, plus exam skills and evidence reading, with interactive explorers.

AP Music Theory

Ten lessons across the eight units from pitch and scales to modes and form, plus exam skills, with interactive explorers.

AP Art History

Ten lessons across the ten units: how to analyze a work, context, and art from prehistory to the global contemporary, plus exam skills, with interactive explorers.

A-Level Mathematics

14 lessons covering the pure mathematics, mechanics and statistics areas of a UK A-level Mathematics course, with exam skills and interactive explorers.

A-Level Further Mathematics

Fourteen lessons covering core Further Mathematics content (proof, complex numbers, matrices, series, calculus, hyperbolic functions, differential equations, vectors, polar coordinates) and mechanics, statistics and discrete options, with interactive explorers.

A-Level Biology

Eleven lessons covering the eight topic areas of A-level Biology, from biological molecules and cells to gene expression, with practical skills and interactive explorers.

A-Level Chemistry

Ten lessons covering physical, inorganic and organic chemistry for A-level, with practical and exam skills and interactive explorers.

A-Level Physics

Ten lessons covering measurements, particles, waves, mechanics, electricity, fields, thermal physics, oscillations and nuclear physics for A-level, with exam skills and interactive explorers.

A-Level Economics

Ten lessons covering microeconomics, macroeconomics and the international economy for A-level, with exam skills and interactive explorers.

AP Chinese Language and Culture

Ten lessons on the revised exam: tones and characters, key sentence patterns, story narration, email response, the project presentation and Q&A, and multiple-choice pacing. Written study guide; no audio.

AP Computer Science Principles

Twelve lessons across the five big ideas, from binary and data to algorithms, networks, security and impact, with the Create task and written responses explained.

AP Spanish Language and Culture

Ten lessons on the revised exam: the three modes, the six themes, key grammar, the project presentation and Q&A, the essay and multiple-choice strategy. Written study guide; no audio.

Calculus I

Ten lessons on limits, continuity, derivatives and their rules, the chain rule, related rates, approximation, curve sketching, optimization and the Fundamental Theorem, with sliders and worked examples.

Introduction to Microeconomics

Ten lessons on choice, demand and supply, elasticity, surplus, taxes, costs, competition, monopoly, externalities and game theory, with sliders and worked examples.

Statistics

Ten lessons on describing data, z-scores, probability and Bayes, the binomial, sampling distributions, confidence intervals, hypothesis tests, t procedures, chi-square and regression, with sliders and worked examples.

AP Seminar

Ten lessons on how AP Seminar is scored, research questions, judging sources, reading arguments, perspectives, the exam's short-answer and essay sections, and both performance tasks, with sliders and worked examples.

AP Research

Ten lessons on how AP Research is scored, finding a gap and a question, the literature review, method, sampling and ethics, data collection, results, discussion and limits, writing on a schedule, and the presentation and oral defense, with sliders and worked examples.