Tier 1
Tier 2
Tier 3
Tier 2-3
Tier 2-3
100

Monumental structures with a square or triangular base and sloping sides that meet at a point (apex) at the top.

Pyramids

100

A first-hand account of an event, created by someone who saw it happen or lived through it.

Primary Source

100

The freedoms or protections that every person is entitled to have just because they are human.

Rights

100

FREE

100

100

A system of beliefs, practices, and values that often involves belief in one or more gods or spirits, and answers questions about life, purpose, and the universe.

Religion

200

It has its own government, makes its own laws, and controls the land around it.

City-States

200

Created after an event by someone who did not experience it firsthand.

Secondary Source

200

The study of the Earth's land, water, climate, and people—and how they all connect and affect each other.

Geography

200

FREE

200

200

Is the group of people and institutions that have the power to make laws, enforce rules, and manage a country, state, or community.

Government

300

Countries or regions that are controlled or influenced by a stronger power and are required to pay tribute (money, goods, or resources) to that power.

Tribute-States

300

A large group of different lands or countries that are all controlled by one ruler or government.

Empire

300

A way to show events in the order they happened, usually from earliest to latest.

Timeline

300

Believing in or worshiping many gods.

Polytheistic

300

A complex society with cities, a government, social classes, writing, and culture.

Civilization

400

A type of farming method used by the Aztecs to grow crops on shallow lake beds.

Chinampas

400

A form of government where a king or queen rules a country.

Monarchy

400

Rules made by governments that tell people what they can and cannot do.

Laws

400

The original peoples who lived in the Americas (North, Central, and South America) before Europeans arrived.

Indigenous Americans
400

A person who studies and writes about the past.

Historian

500

A type of labor tax used by the Inca Empire in South America.

Mit'a System

500

Different groups of people in a society, usually based on wealth, job, education, or family background.

Social Classes

500

The practice of growing crops and raising animals for food, clothing, and other products.

Agriculture

500

Way of growing crops on steep hills or mountains by creating flat steps, on the slopes.

Terrance Farming

500

Is everything around us — including the air, water, land, plants, animals, and people — that affects how we live.

Environment