Journey Through Ancient Number Systems

How the World Counted

Seven stations, five thousand years: Egyptian scribes carved lotus flowers, Babylonians counted in 60s, Chinese merchants calculated with bamboo rods, the Maya invented a shell for nothing — and it all leads to the two little digits running your phone. (Check a clock: the Babylonians are still in charge of your minutes.)

🏺 7 stations · 5,000 years of counting 🎛️ Live number converter

📄 Babylonian Worksheet (PDF) 📄 Mayan Worksheet (PDF)

🎛️ The Time Machine Converter

Type any number up to 3,599 and see it the way an Egyptian scribe, a Babylonian accountant, a Roman stonecutter, a Chinese merchant, a Mayan astronomer — or your phone — would write it:

← try your age, the year, or 60!

Egyptian · ~3000 BC

📜 Carved on a tomb

Babylonian · ~1900 BC

𒀭 Pressed into clay

Roman · ~500 BC

🏛️ Carved in stone

Chinese rods · ~400 BC

🧮 Laid on a counting board

Mayan · ~250 AD

🌽 Stacked like a temple

Hindu-Arabic · ~600 AD

🔢 The one you typed!

Binary · today

💻 Light switches in a chip

▶️ Lesson

📜 Egyptian hieroglyphs — the idea

One picture for 1 (a stroke), one for 10 (a heel bone), one for 100 (a coil of rope), one for 1,000 (a lotus flower). Repeat the pictures and add them up — that's the whole system. No zero needed, and the order doesn't even matter.

📜 Egyptian hieroglyphs — your mission

1️⃣ 📄 Print the Egyptian Hieroglyph KitDecode real carvings. Answer key inside. 2️⃣ ▶️ Watch: Egyptian Numeral SystemThe video confirms what you cracked. 3️⃣ 🎛️ Check yourself on the converterType your age — count the symbols!

🏺 Babylonian base 60 — the idea

Two marks: ❮ means ten and | means one, pressed into wet clay. They counted up to 59 in each spot, and each spot is worth 60 times the one next to it. Sounds strange? Your clock still does it — 60 minutes, 60 seconds.

🏺 Babylonian base 60 — your mission

1️⃣ 📄 Print the Babylonian worksheetCrack base-60 yourself first. 2️⃣ ▶️ Watch: Babylonian NumbersThen watch the story. 3️⃣ 🎛️ Check yourself on the converterTry 60 — watch it jump to a new place!

🏛️ Roman numerals — the idea

Letters are numbers: X is always 10, wherever it sits. Add them from big to small — but a small letter before a bigger one subtracts (IV = 4). With no zero and no place value, it's fine for carving dates and terrible for doing math.

🏛️ Roman numerals — your mission

1️⃣ 📄 Print the Roman Numeral KitCrack the code, hit the length trap. Key inside. 2️⃣ ▶️ Watch: Roman Numeral SystemI, V, X, L, C, D, M — the whole code. 3️⃣ 🎛️ Check yourself on the converterTry 3,549 and count the M's!

🧮 Chinese counting rods — the idea

Bamboo sticks laid on a counting board: count the sticks to read a digit, and a crossed stick means 5. Ones stand UP, tens lie FLAT, and an empty space means zero. True place value, a thousand years before our digits — and merchants calculated by physically moving the rods.

🧮 Chinese counting rods — your mission

1️⃣ 📄 Print the Counting Rod KitRead the boards, lay your own rods. Key inside. 2️⃣ 🎛️ See any number in rods on the converterTry 205 — spot the empty space doing zero's job.

No video for this stop — grab toothpicks and lay some real numbers instead!

🌽 Mayan base 20 — the idea

Dots are 1 and bars are 5, stacked like floors of a temple — each floor worth 20 times the one below. And their greatest invention: a shell 🐚 that means zero, centuries before Europe had one.

🌽 Mayan base 20 — your mission

1️⃣ 📄 Print the Mayan worksheetDots, bars, and shells. 2️⃣ ▶️ Watch: Mayan NumbersThen watch the story. 3️⃣ 🎛️ Check yourself on the converterType 20 — watch the temple grow a floor!

🔢 Hindu-Arabic — the idea

Our ten digits, invented in India and carried west by Arabic scholars. The superpower: WHERE a digit sits decides what it's worth, and zero holds empty places open. It beat every system on this page — because it makes math the easiest.

🔢 Hindu-Arabic — your mission

1️⃣ ▶️ Watch: Hindu-Arabic Numeral SystemThe 1,500-year journey of 0–9. 2️⃣ 📄 Print: Why Ours WonPlace-value X-ray + the symbol-counting race. Key inside.

💻 Binary — the idea

Computers are packed with tiny switches: OFF is 0, ON is 1 — that's the whole alphabet. Places double (1, 2, 4, 8, 16…) instead of ×10, so eight switches can reach 255. Three of those numbers paint every color on your screen. The Lesson button takes you to the full Binary Lab.

🗺️ System comparison

System	Base	Has zero?	Still with us today
📜 Egyptian	10 — repeat & add	never needed one!	tombs we can still read
🏺 Babylonian	60	eventually (a placeholder)	minutes, seconds, 360° circles
🏛️ Roman	none — letters add up!	no (their downfall)	clocks, chapters, Super Bowls
🧮 Chinese rods	10	an empty space (later 〇)	the abacus, negative numbers
🌽 Mayan	20	yes — a shell 🐚	calendar mathematics
🔢 Ours (Hindu-Arabic)	10	yes	everything else!
💻 Binary (computers)	2	yes — half the alphabet!	every phone, game & photo

The journey is complete — 5,000 years, one idea: a civilization is only as good as its way of writing numbers.

🍎 For teachers

This unit looks like a history tour, but it's really a place-value unit in disguise: students only truly see how our numbers work when they visit systems that work differently — no place value (Egypt, Rome), a different base (60, 20, 2), or a hard-won zero. The kids come home to 4,507 understanding why it means what it means — plus 5,000 years of history along the way. The lesson-plan download opens with a one-page overview of exactly this, then a classroom-ready plan for every station.

Every station has an answer key. The five newer kits print theirs on the last page automatically; the original Babylonian and Mayan worksheets came as separate PDFs, so their keys are separate downloads:

Station	Printable	Answer key
📜 Egyptian	Hieroglyph Kit	last page of the kit
🏺 Babylonian	Worksheet	🔑 separate key PDF
🏛️ Roman	Roman Numeral Kit	last page of the kit
🧮 Chinese rods	Counting Rod Kit	last page of the kit
🌽 Mayan	Worksheet	🔑 separate key PDF
🔢 Hindu-Arabic	Why Ours Won	last page of the kit
💻 Binary	Code-Breaker Kit	last page of the kit

Classroom move: after each worksheet, have students write today's date or their age in the ancient system with the converter above — then check each other's clay tablets.