Specialty Digest

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The Knowledge Library for All

Academy

Learn it properly. Interactive programs from secondary school to the workplace, every lesson built the same way: a clear goal, a familiar example, a plain explanation, worked solutions, practice with instant marking, full answers and a short recap.

Browse tracksVirtual STEM Laboratory

How every lesson works

Each lesson takes 45 to 60 minutes and follows the same seven steps, so you always know where you are and what comes next.

  1. Step 1Learning goalExactly what you will be able to do, stated so you can test yourself against it.
  2. Step 2Familiar exampleA situation you already know, with a prediction to make before any theory appears.
  3. Step 3Clear explanationThe idea in plain language first, then the precise statement, with common mistakes named.
  4. Step 4Worked exampleFully solved problems with every step shown, graded from easy to demanding.
  5. Step 5Learner practiceProblems with instant marking, including numbers that change each time you try.
  6. Step 6Answer explanationWhy each answer is right and why the tempting wrong answers fail.
  7. Step 7Short recapThe few points to keep, and a checklist to confirm what you can now do.

Secondary and High School

Interactive subject programs for secondary and high school learners, written to the combined requirements of UK and Cambridge, WAEC/WASSCE, IB and US curricula.

Ages 11 to 18 · 8 subject areas

3 lessons open

  • Mathematics

    Number, algebra, geometry, statistics and problem solving.

    Lesson: Linear Inequalities →

    Lesson: Solving Linear Equations in One Variable →

    Lesson: Straight-Line Graphs and Equations →

  • Physics

    Forces, energy, waves, electricity and the physical world.

  • Chemistry

    Matter, reactions, bonding and the periodic table.

  • Biology

    Cells, living systems, inheritance and ecology.

  • Computer Science

    Computational thinking, programming and how computers work.

  • Economics and Business Studies

    Markets, money, enterprise and decision making.

  • English Language and Writing

    Reading, argument, grammar and clear writing.

  • Geography and History

    Places, people, evidence and the story of how the world came to be.

University Courses

Rigorous courses with derivations, graded problem sets and worked solutions, benchmarked against the published syllabi of leading universities.

First-year to advanced undergraduate · 8 subject areas

3 lessons open

  • Statistics and Probability

    Probability, sampling, inference, regression and modelling.

    Lesson: Confidence Intervals for a Mean →

    Lesson: Hypothesis Tests for a Mean →

    Lesson: Sampling Distributions and the Central Limit Theorem →

  • Calculus and Analysis

    Limits, derivatives, integrals, series and proof.

  • Linear Algebra

    Vectors, matrices, eigenvalues and transformations.

  • Computer Science

    Algorithms, data structures, systems and theory.

  • Data Science and Machine Learning

    Data handling, learning from data and model evaluation.

  • Economics

    Microeconomics, macroeconomics and econometrics.

  • Physics

    Mechanics, electromagnetism, thermal physics and quantum ideas.

  • Engineering Foundations

    Modelling, design and the mathematics engineers use every day.

Business, Technology and Workplace Skills

Practical programs built on cases, templates and decision practice, for people who need skills they can use at work this week.

Early career to senior professional · 8 subject areas

2 lessons open

  • Project Management

    Scope, schedule, cost, risk and delivery.

    Lesson: Defining Project Scope and Managing Risk →

    Lesson: Scheduling and the Critical Path →

  • Data and Analytics

    Spreadsheets, dashboards, metrics and decisions from data.

  • Leadership and Management

    Leading people, teams and change.

  • Communication and Writing

    Clear writing, presenting and difficult conversations.

  • Finance for Non-Finance Professionals

    Budgets, statements, cash flow and investment decisions.

  • Technology and AI Skills

    Working with software, automation and AI tools well.

  • Workplace Effectiveness

    Negotiation, time, meetings and working with others.

  • Entrepreneurship and Strategy

    Opportunities, business models and competitive strategy.

Our standard

Academy aims for university-grade rigor: precise definitions, derivations where they belong, checked numbers and graded problems with full solutions. Course scope is benchmarked against the published syllabi of leading universities and the requirements of major examination bodies, and every word is original.

  • Every number in a worked example is calculated and checked before publication.
  • Limits are stated: what a method assumes, and where it stops being valid.
  • Academy lessons support, and do not replace, your own course, teacher or employer’s standards, and they do not award degrees or certificates.
Open the EncyclopediaEditorial standards