The lessons start from things students have already seen: narrowing down a guess with yes/no questions, ripples crossing in a puddle, dice rolls evening out over many tries. Each module builds from one of those toward a quantum idea and its name.
Nobody tells you the answer up front. Every lesson starts with a question, you commit to a guess, and then an experiment or simulation shows what really happens. The explanation comes after you want it.
A question you can already half-answer, like "How can just two symbols hold any message?"
Write down what you think will happen. Being wrong here is useful, and expected.
Cards, dice, rope waves, polarizing filters, or a circuit simulator. The materials are ordinary classroom items or a free web simulator.
Now the idea gets its real name, and you use it on a new problem before the lesson ends.
You can start at any band. Each book begins by telling you what the earlier level covered, so you are never lost.
You will: become the bits in a human binary code, make waves add up and cancel, roll dice to see why scientists repeat experiments, and play a game that shows how to catch an eavesdropper.
You will be able to explain: what a bit is, what a qubit is, why measuring gives one result, and why "the cat is alive and dead at once" is not what science says.
You will: write states as |0⟩ and |1⟩, work out probabilities from amplitudes, build small circuits on paper and then run them in a simulator, and walk through the BB84 key exchange.
You will be able to explain: why the H gate applied twice gives back what you started with, and why that depends on a minus sign.
You will: use complex numbers, vectors and 2×2 matrices to write a qubit exactly, derive the Born rule, and place any state on the Bloch sphere.
You will be able to explain: what α|0⟩ + β|1⟩ means, why |α|² + |β|² = 1, and what interference has to do with phase.
You will: work with multi-qubit states, prove that gates are unitary, build Bell pairs, trace Deutsch–Jozsa, Grover and Shor, analyze QKD security, and finish with a capstone project.
You will be able to explain: which states cannot be taken apart, what a quantum computer is actually good at, and what it is not.
These appear often in popular accounts. The books mark each one and give the accurate wording.
Your guide through every book is a cat named after the ket, |ψ⟩, the symbol for a quantum state. Look at our mark: it is a qubit state, (1/√2)|0⟩ + (1/√2)|1⟩, with one cat drawn twice: sitting up as |0⟩ and lying down as |1⟩. It is the same cat in both kets, because the state belongs to one cat. Grades 6–8 learn to read it. Grades 9–10 learn to calculate with it. Professor Ket is Schrödinger's cat, and Professor Ket's whole job is to show you that the cat is not both.
For Grades 4–8: pencil, paper, a few index cards and a die. For high school: a scientific calculator and a web browser for the circuit simulator. The optional coding labs in Grades 11–12 use free, open-source tools.
Every simulator activity has a printable version, so you can do the whole program offline.
No prior physics is needed at home. Each elementary module takes 45 to 60 minutes and uses ordinary household materials. A useful question to ask at home is "What did you predict, and what actually happened?"
Questions: info@mqc.academy
Students and families can write to us with questions. Teachers can request a review copy of any book.
