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Interactive courses · Chemistry first

Learn chemistry by doing it.

Build atoms, read the periodic table, run real experiments in your kitchen — and find out how professional labs analyse a sample. An interactive course that goes from “what is an atom?” to “what’s in my tap water?”.

The Chemistry, hands-on course overview with chapters, lessons and progress
The pH slider showing the red cabbage indicator turning green
37lessons planned
8chapters
8kitchen experiments
4levels of equipment

Touch the ideas, don’t just read them

Add a proton and watch carbon turn into nitrogen. Remove an electron and see an ion appear. Interactive models sit right inside the lessons, so every concept is something you can poke at.

Atom builder widget

See the patterns behind the elements

The periodic table is a map, not a list. Click any element to see its family, its shells and its valence electrons — and where you meet it in everyday life.

Interactive periodic table with copper selected

Real experiments, safely, at home

Split water with a 9 V battery, unmix the dyes in a marker, grow crystals, make a pH indicator from red cabbage. Every experiment lists exactly what you need, step by step, with clear safety notes — and explains what you just saw.

Experiment card for splitting water with a battery

Turn fizz into numbers

Predict how much gas a reaction should release, then weigh it on your kitchen scale. Calculators and quizzes help you check your thinking as you go.

Calculator predicting carbon dioxide from baking soda and vinegar

Know when you’ve got it

Short questions throughout each lesson give instant feedback and explain the reasoning, whether you picked the right answer or not. Mark lessons complete and watch your progress through the course.

A quiz question answered correctly, with an explanation

From kitchen to lab

Every method in the course comes with the cheapest way to try it yourself, and what more becomes possible as you invest.

  1. €0

    Kitchen

    Red cabbage, baking soda, coffee filters, a 9 V battery. Real chemistry with what’s already in the cupboard.

  2. ≈ €20–300

    Hobby kit

    pH strips, a 0.01 g scale, syringes, safety glasses. Your observations become measurements.

  3. ≈ €300–2 000

    Home lab

    Glassware, a hotplate stirrer, a pH meter, a USB spectrometer. Titrations and colorimetry at home.

  4. Access, not ownership

    Professional lab

    GC, HPLC, ICP and NMR — what they do, and how to get a sample analysed without buying one.

What you’ll learn

Part 1 · Foundations — how chemistry works, how samples are analysed, and what you can test at home.

  1. 1

    Matter and atomsAvailable now

    Atoms, isotopes, electron shells and the periodic table.

  2. 2

    Bonds, molecules and mixtures

    How atoms stick together, and why salt dissolves but oil doesn’t.

  3. 3

    Chemical reactions

    Balancing equations, energy, rates and equilibrium.

  4. 4

    Acids, bases and redox

    pH, titration, rust, batteries and a first taste of organic chemistry.

  5. 5

    How we analyse samples

    Wet chemistry, chromatography, spectroscopy, mass spec and NMR.

  6. 6

    The lab and its machines

    What each instrument does, what goes in, what comes out — and what it costs.

  7. 7

    Kitchen chemistryAvailable now

    Eight real experiments with things you already own.

  8. 8

    Levelling up your home lab

    What each step of investment unlocks, ending with a tap-water analysis.

Start with your first atom

Ten minutes from now you’ll know what everything is made of.

© 2026 ClassroomExperiments are designed for home use with adult supervision. Always read the safety notes.