Online Self-Paced Science Lessons

Our collection of science lessons is designed to cover key concepts and skills in the areas of astronomy, biology, chemistry, physics, earth science, and scientific practices.

Our lessons for middle/high school students are meant for self-directed online learning. Many of our lessons contain a short introduction, followed by an embedded video created by Help Teaching team or obtained with permission from sources, such as Khan Academy, Educator.com, and Bozeman Science and links to other free online resources to help students understand the topic. Lessons without a video source noted are text and image-based, similar to what students would find in a textbook. All lessons also include practice questions to use for pre-assessment and practice, as well as links to longer, more formal tests and worksheets to assess what students have learned.

Assigning lessons is simple and doesn't require students to have accounts. Help Teaching subscribers can assign lessons to students by selecting the "Assign Lesson" icon and monitor student progress in our online testing platform, Test Room.

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Video Sources: Help Teaching Khan Academy Educator.com Other (may contain ads we do not control)

Astronomy

		Lesson Name	Grade	Time
		Why Does The Sun Look So Bright?	Grade 5	15-30 min	assign
		Constellations	Grade 6	15-30 min	assign
		Earth's Rotation and Revolution	Grade 6	15-30 min	assign
		Lunar Phases	Grade 6	15-30 min	assign
		Solar System Introduction	Grade 6	15-30 min	assign
		The Inner Planets	Grade 6	15-30 min	assign
		The Outer Planets	Grade 6	15-30 min	assign
		Meteor Showers	Grade 7	15-30 min	assign
		Solar Eclipses	Grade 7	30-60 min	assign
		Solstices and Equinoxes	Grade 7	15-30 min	assign
		Lunar Eclipses	Grade 8	15-30 min	assign
		Solar Structure	Grade 8	15-30 min	assign
		The Moon's Surface Features	Grade 8	15-30 min	assign

Biology

		Lesson Name	Grade	Time
		The Little Flower - A Science Story	Kindergarten	15-30 min	assign
		What's for Dinner? - A Science Story	Kindergarten	15-30 min	assign
		Amphibian Vocabulary Words	Grade 3	15-30 min	assign
		Bird Vocabulary Words	Grade 3	15-30 min	assign
		Fish Vocabulary Words	Grade 3	15-30 min	assign
		Invertebrates	Grade 3	15-30 min	assign
		Mammal Vocabulary Words	Grade 3	15-30 min	assign
		Reptile Vocabulary Words	Grade 3	15-30 min	assign
		All About Fish	Grade 10	30-60 min	assign
		Annelids and Arthropods	Grade 10	30-60 min	assign
		Bacteria	Grade 10	30-60 min	assign
		Cell Division - Mitosis	Grade 10	30-60 min	assign
		Cell Transport - Diffusion & Osmosis	Grade 10	30-60 min	assign
		Cells: Anatomy and Physiology	Grade 10	30-60 min	assign
		Characteristics of Life	Grade 10	45-90 min	assign
		Chordates	Grade 10	30-60 min	assign
		Fungi	Grade 10	15-30 min	assign
		Meiosis	Grade 10	45-90 min	assign
		Nonvascular Plants	Grade 10	30-60 min	assign
		Organization of Living Things	Grade 10	15-30 min	assign
		Plant Reproduction	Grade 10	30-60 min	assign
		The Protists	Grade 10	30-60 min	assign
		The Simple Animals	Grade 10	30-60 min	assign
		The Theory of Evolution	Grade 10	30-60 min	assign
		Vascular Plants	Grade 10	30-60 min	assign
		What is a Virus?	Grade 10	15-30 min	assign
		All About Amphibians	Grade 11	30-60 min	assign
		All About Birds	Grade 11	30-60 min	assign
		All About Mammals	Grade 11	30-60 min	assign
		Animal Behavior	Grade 11	30-60 min	assign
		Animal Body Plans	Grade 11	30-60 min	assign
		Competition	Grade 11	30-60 min	assign
		DNA Structure and Replication	Grade 11	30-60 min	assign
		Development - From Cell to Organism	Grade 11	30-60 min	assign
		Echinoderms	Grade 11	30-60 min	assign
		Ecological Succession	Grade 11	30-60 min	assign
		Ecosystem Ecology	Grade 11	45-90 min	assign
		Heredity, Genetics and Punnett Squares	Grade 11	30-60 min	assign
		Homeostasis	Grade 11	30-60 min	assign
		How Do Muscles Work?	Grade 11	30-60 min	assign
		How New Species Arise	Grade 11	15-30 min	assign
		Impact on the Environment	Grade 11	45-90 min	assign
		Plant Nutrition	Grade 11	30-60 min	assign
		RNA and Protein Synthesis	Grade 11	30-60 min	assign
		The Digestive System	Grade 11	15-30 min	assign
		The Endocrine System	Grade 11	15-30 min	assign
		The Immune System	Grade 11	15-30 min	assign
		The Nervous System	Grade 11	45-90 min	assign
		The Respiratory System	Grade 11	30-60 min	assign
		The Skeletal System	Grade 11	15-30 min	assign
		Root Vegetables Worksheet	None	15-30 min	assign

Chemistry

		Lesson Name	Grade	Time
		AP Chemistry - Bohr Model	Grade 10	45-90 min	assign
		Alloys	Grade 10	45-90 min	assign
		Arrhenius Theory of Acids & Bases	Grade 10	30-60 min	assign
		Balancing Chemical Equations	Grade 10	60-120 min	assign
		Band of Stability	Grade 10	60-120 min	assign
		Bonding	Grade 10	60-120 min	assign
		Bronsted Theory of Acids & Bases	Grade 10	45-90 min	assign
		Conditions For Equilibrium	Grade 10	60-120 min	assign
		Electron-Dot Diagrams & Properties	Grade 10	45-90 min	assign
		Energy	Grade 10	45-90 min	assign
		Half-Life	Grade 10	45-90 min	assign
		Heating Curves	Grade 10	60-120 min	assign
		Heisenberg Uncertainty Principle	Grade 10	60-120 min	assign
		History of the Atom	Grade 10	60-120 min	assign
		Intensive vs. Extensive Properties	Grade 10	30-60 min	assign
		Isotopes	Grade 10	45-90 min	assign
		Kinetic Energy and Temperature	Grade 10	45-90 min	assign
		Kinetic Molecular Theory	Grade 10	45-90 min	assign
		Naming Chemical Compounds	Grade 10	60-120 min	assign
		Neutralization Reactions	Grade 10	60-120 min	assign
		Organization of Matter	Grade 10	60-120 min	assign
		Oxidation States	Grade 10	60-120 min	assign
		Percent Composition By Mass	Grade 10	60-120 min	assign
		Periodic Trends	Grade 10	60-120 min	assign
		Photosynthesis	Grade 10	30-60 min	assign
		Polyatomic Ions	Grade 10	60-120 min	assign
		Scientific Notation	Grade 10	45-90 min	assign
		Separating Mixtures	Grade 10	60-120 min	assign
		Significant Figures	Grade 10	45-90 min	assign
		Types of Radioactive Decay	Grade 10	60-120 min	assign
		Uses of Radioisotopes	Grade 10	60-120 min	assign
		Vapor Pressure	Grade 10	15-30 min	assign
		Acids, Bases, and Living Things	Grade 11	30-60 min	assign
		Buffers	Grade 11	60-120 min	assign
		Cellular Respiration	Grade 11	60-120 min	assign
		Chemical Bonds of Life	Grade 11	30-60 min	assign
		Electronegativity & Bond Polarity	Grade 11	45-90 min	assign
		Energy and Entropy	Grade 11	60-120 min	assign
		Functional Groups	Grade 11	15-30 min	assign
		Ideal Gas Equation	Grade 11	60-120 min	assign
		Position and Behavior of Electrons	Grade 11	15-30 min	assign
		Quantum Numbers	Grade 11	60-120 min	assign
		Quantum Numbers and Orbital Shapes	Grade 11	60-120 min	assign
		Structure and Function of Carbohydrates	Grade 11	30-60 min	assign
		Structure and Function of Lipids	Grade 11	45-90 min	assign
		Structure and Function of Proteins	Grade 11	45-90 min	assign
		Transition Metals	Grade 11	60-120 min	assign
		AP Chemistry - Solid Structures & Types	College	60-120 min	assign
		Coulomb's Law - AP Chemistry	College	60-120 min	assign
		First Law of Thermodynamics - AP Chemistry	College	60-120 min	assign
		Kinetics of Nuclear Decay - AP Chemistry	College	60-120 min	assign
		Redox Reactions - AP Chemistry	College	60-120 min	assign

Earth Science

		Lesson Name	Grade	Time
		I Can't Live Here! - A Science Story	Kindergarten	15-30 min	assign
		Rain, Rain, Go Away - A Science Story	Kindergarten	15-30 min	assign
		The Trash Patrol - A Science Story	Kindergarten	15-30 min	assign
		Earth Event Timescales	Grade 3	15-30 min	assign
		Ocean Vocabulary Words	Grade 3	15-30 min	assign
		Reduce, Reuse, Recycle	Grade 3	15-30 min	assign
		Severe Weather Vocabulary Words	Grade 3	15-30 min	assign
		Weather Vocabulary Words	Grade 3	15-30 min	assign
		Introduction to Biogeology	Grade 4	15-30 min	assign
		Earth's Water	Grade 5	15-30 min	assign
		Natural Resources	Grade 5	15-30 min	assign
		What is a Natural Hazard?	Grade 5	15-30 min	assign
		Branches of Earth Science	Grade 6	15-30 min	assign
		Earth's Four Spheres	Grade 6	15-30 min	assign
		Fossils	Grade 6	30-60 min	assign
		Lakes	Grade 6	15-30 min	assign
		The Rock Cycle	Grade 6	15-30 min	assign
		The Water Cycle	Grade 6	15-30 min	assign
		Types of Faults	Grade 6	15-30 min	assign
		Weather and Climate	Grade 6	15-30 min	assign
		What is Soil?	Grade 6	15-30 min	assign
		Earth's Layers	Grade 7	15-30 min	assign
		Groundwater	Grade 7	15-30 min	assign
		Hurricanes	Grade 7	15-30 min	assign
		River Systems	Grade 7	15-30 min	assign
		Rock Types	Grade 7	15-30 min	assign
		Soil Horizons	Grade 7	15-30 min	assign
		Tides	Grade 7	30-60 min	assign
		Topographic Maps	Grade 7	15-30 min	assign
		Tornadoes	Grade 7	15-30 min	assign
		Tsunamis	Grade 7	15-30 min	assign
		Weather Fronts	Grade 7	15-30 min	assign
		What is a Mineral?	Grade 7	15-30 min	assign
		Erosion	Grade 8	30-60 min	assign
		Layers of the Atmosphere	Grade 8	30-60 min	assign
		Mineral Properties	Grade 8	15-30 min	assign
		Ocean Zones	Grade 8	15-30 min	assign
		The Geologic Time Scale	Grade 8	30-60 min	assign
		The Ring of Fire	Grade 8	15-30 min	assign
		Types of Volcanoes	Grade 8	15-30 min	assign
		Weather Maps	Grade 8	15-30 min	assign
		Weathering	Grade 8	15-30 min	assign
		Global Climate Change	Grade 9	15-30 min	assign
		Igneous Rock Identification	Grade 9	15-30 min	assign
		Introduction to Plate Tectonics	Grade 9	30-60 min	assign
		Metamorphic Rock Identification	Grade 9	15-30 min	assign
		Mineral Hardness and Mohs Scale	Grade 9	15-30 min	assign
		Relative Dating	Grade 9	30-60 min	assign
		Sedimentary Rock Identification	Grade 9	15-30 min	assign

Physics

		Lesson Name	Grade	Time
		Push and Pull - A Science Story	Kindergarten	15-30 min	assign
		The Sandy Beach - A Science Story	Kindergarten	15-30 min	assign
		Acceleration	Grade 8	60-120 min	assign
		Applications of Nuclear Physics	Grade 8	60-120 min	assign
		Center of Mass and Center of Gravity	Grade 8	60-120 min	assign
		Changes in States of Matter	Grade 8	60-120 min	assign
		Chemical Equation	Grade 8	60-120 min	assign
		Chemical Formula	Grade 8	60-120 min	assign
		Chemical Reactions	Grade 8	60-120 min	assign
		Elastic Force	Grade 8	60-120 min	assign
		Electric Field and Energy	Grade 8	60-120 min	assign
		Energy	Grade 8	60-120 min	assign
		Energy Flow and Chemical Reaction	Grade 8	60-120 min	assign
		Energy Transformation	Grade 8	15-30 min	assign
		Factors Affecting Energy Transfer	Grade 8	60-120 min	assign
		Feedback Loops	Grade 8	60-120 min	assign
		Force	Grade 8	60-120 min	assign
		Friction	Grade 8	60-120 min	assign
		Friction and Energy Transfer	Grade 8	60-120 min	assign
		Gases	Grade 8	60-120 min	assign
		Gravity	Grade 8	60-120 min	assign
		Gravity and Motion	Grade 8	60-120 min	assign
		Introduction to Heat Energy	Grade 8	15-30 min	assign
		Isotopes	Grade 8	60-120 min	assign
		Kinetic Energy	Grade 8	60-120 min	assign
		Kinetic Energy and the State of Matter	Grade 8	15-30 min	assign
		Liquids	Grade 8	60-120 min	assign
		Magnetic Field and Energy	Grade 8	15-30 min	assign
		Momentum	Grade 8	60-120 min	assign
		Motion	Grade 8	60-120 min	assign
		Natural Resources	Grade 8	60-120 min	assign
		Newton’s Laws of Motion	Grade 8	60-120 min	assign
		Nuclear Fission	Grade 8	15-30 min	assign
		Nuclear Fusion	Grade 8	60-120 min	assign
		Nuclear Reactions	Grade 8	60-120 min	assign
		Potential Energy	Grade 8	60-120 min	assign
		Projectile Motion	Grade 8	60-120 min	assign
		Radioactive Decay	Grade 8	60-120 min	assign
		Radioactive Isotopes	Grade 8	60-120 min	assign
		Rate of Reaction	Grade 8	60-120 min	assign
		Satellite Motion	Grade 8	60-120 min	assign
		Solids	Grade 8	60-120 min	assign
		Speed	Grade 8	60-120 min	assign
		Stability through Interactions and Feedback	Grade 8	60-120 min	assign
		Stable Cycles	Grade 8	60-120 min	assign
		States of Matter	Grade 8	60-120 min	assign
		Structure of an Atom	Grade 8	60-120 min	assign
		Synthetic Materials	Grade 8	60-120 min	assign
		The Art of Balancing	Grade 8	60-120 min	assign
		The First Law of Thermodynamics & Energy Transfer	Grade 8	60-120 min	assign
		The Physics of Falling Objects	Grade 8	60-120 min	assign
		The Second Law of Thermodynamics & Energy Transfer	Grade 8	15-30 min	assign
		Thermal Energy and Everyday Life	Grade 8	60-120 min	assign
		Types of Chemical Reactions	Grade 8	60-120 min	assign
		Types of Friction	Grade 8	15-30 min	assign
		Types of Motion	Grade 8	60-120 min	assign
		Velocity	Grade 8	60-120 min	assign
		Acceleration	Grade 10	45-90 min	assign
		Boyle's Law	Grade 10	60-120 min	assign
		Capillary Action	Grade 10	60-120 min	assign
		Charles' Law	Grade 10	60-120 min	assign
		Doppler Effect	Grade 10	60-120 min	assign
		Elastic Potential Energy	Grade 10	60-120 min	assign
		Electromagnetic Spectrum	Grade 10	60-120 min	assign
		Force Diagrams	Grade 10	60-120 min	assign
		Inclined Planes	Grade 10	60-120 min	assign
		Laws of Motion	Grade 10	60-120 min	assign
		Momentum and Collisions	Grade 10	60-120 min	assign
		Newton's Law of Universal Gravitation	Grade 10	45-90 min	assign
		Position vs. Time Graphs	Grade 10	45-90 min	assign
		Power	Grade 10	45-90 min	assign
		Refraction of Light	Grade 10	60-120 min	assign
		Resistance and Ohm's Law	Grade 10	60-120 min	assign
		Simple Harmonic Motion	Grade 10	60-120 min	assign
		Speed and Velocity	Grade 10	60-120 min	assign
		Static Electricity	Grade 10	60-120 min	assign
		Surface Tension	Grade 10	60-120 min	assign
		Work	Grade 10	45-90 min	assign
		Electromagnetic Spectrum	Grade 11	60-120 min	assign
		Hooke's Law	Grade 11	60-120 min	assign
		Pulleys	Grade 11	60-120 min	assign
		Torque	Grade 11	60-120 min	assign
		Wave Speed	Grade 12	60-120 min	assign

Scientific Methods and Applications

		Lesson Name	Grade	Time
		Laboratory Safety Symbols	Grade 6	15-30 min	assign
		Science Lab Reports	Grade 9	15-30 min	assign
		Science Laboratory Equipment	Grade 9	15-30 min	assign
		The Scientific Method	Grade 9	45-90 min	assign