Unit
Unit 2
Every live lesson filed under Unit 2, grouped by subject and unit. That's 70 of them right now, and the rest of the shelf is one click away.
AI Literacy · Unit 2: How AI Actually Works (Under the Hood)
9 lessons
How AI Generates Images: From Words to Pictures
Reading Comprehension Worksheet
How AI Generates Voice and Video
Reading Comprehension Worksheet
How AI Learns: Training Data Explained
Reading Comprehension Worksheet
The Black Box Problem: When AI Can't Explain Itself
Reading Comprehension Worksheet
The Cost of AI: Energy, Water, and Data Centers
Reading Comprehension Worksheet
The Internet as a Textbook: Where AI Gets Its Information
Reading Comprehension Worksheet
Tokens, Parameters, and Why Bigger Isn't Always Better
Reading Comprehension Worksheet
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What Are Large Language Models (LLMs)?
Reading Comprehension Worksheet
Why AI Sometimes "Hallucinates" Wrong Answers
Reading Comprehension Worksheet
Archaeology · Unit 2
10 lessons
3D Scanning and Virtual Archaeology
Reading Comprehension Worksheet
Beyond Carbon: Other Ways to Date the Past
Reading Comprehension Worksheet
Dating and Detection: The Science Behind Archaeology
Reading Comprehension Worksheet
GIS and Digital Mapping: Archaeology Meets Big Data
Reading Comprehension Worksheet
Ground-Penetrating Radar: X-Ray Vision for Dirt
Reading Comprehension Worksheet
LiDAR: Seeing Through the Jungle from the Sky
Reading Comprehension Worksheet
Pottery Analysis: Why Broken Pots Are an Archaeologist's Best Friend
Reading Comprehension Worksheet
Radiocarbon Dating: How Old Is This Really?
Reading Comprehension Worksheet
Satellite Archaeology: Finding Sites from Space
Reading Comprehension Worksheet
Stratigraphy: Reading the Layers of Earth Like a Book
Reading Comprehension Worksheet
Economics · Unit 2: Supply & Demand
14 lessons
Ceilings & Floors: When Prices Can’t Find Their True Level
Reading Comprehension Worksheet
Elastic or Inelastic? Mastering Price Elasticity of Demand
Reading Comprehension Worksheet
Finding Balance: Market Equilibrium and Price Discovery
Reading Comprehension Worksheet
Markets & the State: Government’s Role in Supply and Demand
Reading Comprehension Worksheet
Measuring Welfare: Consumer Surplus & Producer Surplus
Reading Comprehension Worksheet
Supply Unveiled: How Sellers Decide What to Produce
Reading Comprehension Worksheet
Supply’s Sensitivity: Understanding Price Elasticity of Supply
Reading Comprehension Worksheet
The Law of Demand: Consumer Behavior in Action
Reading Comprehension Worksheet
Law of Demand - Why Price Matters
Full lesson · answer keys
Law of Supply: The Producer Side
Full lesson · answer keys
Market Equilibrium: Where Supply Meets Demand
Full lesson · answer keys
Shortages and Surpluses
Full lesson · answer keys
Surge Pricing: Uber, Hotels & Hurricane Plywood
Full lesson · answer keys
Taylor Swift Economics - Concert Ticket Pricing
Full lesson · answer keys
Geography · Unit 2
27 lessons
Biomes & Ecosystems: Life Across Earth’s Habitats
Reading Comprehension Worksheet
Climate vs. Weather: Understanding the Difference
Reading Comprehension Worksheet
Convergent Boundaries: Where Plates Collide
Reading Comprehension Worksheet
Deserts: Survival in the Harshest Climates
Reading Comprehension Worksheet
Divergent Boundaries: Where Plates Pull Apart
Reading Comprehension Worksheet
Earth’s Layers: From Crust to Core
Reading Comprehension Worksheet
Grasslands: Where Grasses Rule the Landscape
Reading Comprehension Worksheet
Lakes: Freshwater Reservoirs Shaping Ecosystems
Reading Comprehension Worksheet
Landforms 101: Mountains, Valleys, and Plains
Reading Comprehension Worksheet
Major Climate Zones: Polar, Temperate, Tropical
Reading Comprehension Worksheet
Mountains: Rising Giants of Earth’s Surface
Reading Comprehension Worksheet
Oceans: Earth’s Vastest Water System
Reading Comprehension Worksheet
Plate Tectonics & Natural Disasters Explained
Reading Comprehension Worksheet
Polar Climates: Life in the Coldest Zones on Earth
Reading Comprehension Worksheet
Rainforests: Earth’s Lush Biodiversity Hotspots
Reading Comprehension Worksheet
Rivers: Lifelines of the Landscape
Reading Comprehension Worksheet
Temperate Climates: Seasons and Changing Weather
Reading Comprehension Worksheet
The Core: Earth’s Fiery Center of Iron and Nickel
Reading Comprehension Worksheet
The Crust: Earth’s Outermost Layer and Home to Life
Reading Comprehension Worksheet
The Geosphere: Earth’s Solid Foundation
Reading Comprehension Worksheet
The Mantle: Earth’s Moving Middle Layer
Reading Comprehension Worksheet
Transform Boundaries: Sliding Plates and Earthquakes
Reading Comprehension Worksheet
Tropical Climates: Warm and Wet Year-Round
Reading Comprehension Worksheet
Tundra: The Frozen Frontier of Earth’s Biomes
Reading Comprehension Worksheet
Valleys: Lowlands Sculpted by Water and Ice
Reading Comprehension Worksheet
Water Systems 101: Rivers, Lakes, and Oceans
Reading Comprehension Worksheet
Weathering & Erosion: Forces Shaping the Land
Reading Comprehension Worksheet
Marine Science · Unit 2
10 lessons
Coastal Processes: Erosion, Deposition, Barrier Islands, and Estuaries
Reading Comprehension Worksheet
El Niño and La Niña: Ocean-Atmosphere Climate Connections
Reading Comprehension Worksheet
Ocean Tides: Gravitational Forces of the Moon and Sun
Reading Comprehension Worksheet
Properties of Seawater: Salinity, Temperature, and Density
Reading Comprehension Worksheet
Surface Currents and Wind Patterns: The Coriolis Effect and Gyres
Reading Comprehension Worksheet
The Role of Oceans in Weather and Climate Systems
Reading Comprehension Worksheet
Thermohaline Circulation and the Global Conveyor Belt
Reading Comprehension Worksheet
Types of Tides: Diurnal, Semidiurnal, and Mixed
Reading Comprehension Worksheet
Upwelling and Nutrient Cycling in the Ocean
Reading Comprehension Worksheet
Waves: Formation, Characteristics, and Energy Transfer
Reading Comprehension Worksheet