Accelerated ScheduleIf you're looking to build your learner's foundational science knowledge without spending 2–3 years working through the material, this two-semester guide offers a streamlined approach. Designed for lessons twice per week, it covers the core concepts in an engaging and manageable format.

Semester 1 — Weeks 1–15

Session	Lessons	Title(s)
Week 1A	Lesson 1	Organizing Things into Categories
Week 1B	Lesson 2	Solids, Liquids, and Gases
Week 2A	Lesson 4	States of Matter and Temperature Changes
Week 2B	Lesson 3	Gravity Introduction
Week 3A	Lesson 5	Orbits and Gravity in Space
Week 3B	Lesson 6	What is Energy?
Week 4A	Lesson 8	Energy Transformation
Week 4B	Lessons 7 + 9	Air is Real / Air and the Atmosphere
Week 5A	Lesson 10	Distinguishing Living and Nonliving Things
Week 5B	Lessons 11 + 13	Matter is Made of Particles / Changes in Particles
Week 6A	Lesson 12	Light and Shadows
Week 6B	Lessons 14 + 15	Technology, Tools, and the Engineering Process / Reversible and Nonreversible Changes
Week 7A	Lesson 16	Sound and Vibrations
Week 7B	Lesson 18	How Sound and Light Travel in Waves
Week 8A	Lessons 17 + 20	Kinetic and Potential Energy / Energy in the Natural World
Week 8B	Lessons 19 + 22	Plants vs Animals / Where All Food Energy Comes From
Week 9A	Lessons 21 + 23	Categories of Materials / Properties of Different Materials
Week 9B	Lesson 24	The Life Cycle Concept
Week 10A	Lesson 26	Metamorphosis and Life Cycles
Week 10B	Lessons 25 + 27	Understanding Force / How Force and Energy Work Together
Week 11A	Lessons 28 + 30	Animal Adaptations / Food Chains and Energy Flow
Week 11B	Lesson 29	Reading and Drawing Maps
Week 12A	Lesson 31	Matter vs Energy
Week 12B	Lessons 32 + 34	Identifying Local Plants and Animals / Habitats
Week 13A	Lesson 33	Air Pressure
Week 13B	Lessons 37 + 40	Pressure Inside and Outside / Vacuums and Suction
Week 14A	Lesson 35	Day, Night, and Earth's Rotation
Week 14B	Lessons 36 + 39	Compass Directions / Maps and Real-World Directions
Week 15A	Lesson 38	Properties of Magnets
Week 15B	Lessons 41 + 43	Magnetic Fields / Earth as a Magnet

Semester 2 — Weeks 16–30

Session	Lessons	Title(s)
Week 16A	Lessons 42 + 44	What Is a Species? / Variation Within a Species
Week 16B	Lesson 45	Clouds and Weather Patterns
Week 17A	Lesson 46	Adaptations for Survival
Week 17B	Lesson 47	Air as a Mixture of Gases
Week 18A	Lessons 49 + 51	Mixtures vs Chemical Reactions / Respiration, Photosynthesis, and Air
Week 18B	Lesson 48	Earth's Landforms
Week 19A	Lessons 57 + 59	Biomes and Climate / Simple Machines and Work
Week 19B	Lesson 50	Basic Plant Structure
Week 20A	Lessons 52 + 54	How Plants Function / Plant Reproduction and Seeds
Week 20B	Lessons 53 + 55	Evaporation / Condensation and the Water Cycle
Week 21A	Lessons 56 + 58	Seeds and Germination / Seedling Growth and Plant Responses
Week 21B	Lesson 60	Plants, Soil, and Erosion
Week 22A	Lesson 84	Time, Sundials, and Earth's Rotation
Week 22B	Lesson 61	Earth's Orbit and Seasons
Week 23A	Lesson 62	Dissolving and Solutions
Week 23B	Lessons 66 + 68	Solubility / Crystallization
Week 24A	Lessons 63 + 69	Introduction to Inertia / Inertia and Energy
Week 24B	Lessons 76 + 82	Introduction to Friction / Friction, Heat, and Energy Loss
Week 25A	Lesson 86	Air and Water Resistance
Week 25B	Lesson 65	How Fast Things Fall
Week 26A	Lessons 70 + 73	Weightlessness and Free Fall / Mass vs Weight
Week 26B	Lesson 75	Action and Reaction Forces
Week 27A	Lessons 64 + 67	The Skeleton and How It Works / How Muscles Move the Body
Week 27B	Lessons 71 + 74	Vertebrates and Internal Skeletons / Arthropods and External Skeletons
Week 28A	Lesson 72	Nervous System and Movement
Week 28B	Lessons 79 + 88	The Digestive System / Body Systems and Energy
Week 29A	Lessons 77 + 80 + 83	Rocks and Minerals / Crystals and Mineral Structure / Soil Composition
Week 29B	Lessons 78 + 81	Erosion, Sediment, and Fossil Formation / Limestone and Fossils
Week 30A	Lessons 85 + 87	Sedimentary vs Igneous Rock / Rock Layers and Earth's History
Week 30B	Lessons 89 + 90	Introduction to Resources / Human Resources and Resource Limits