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Online Self-Paced Science Lessons

Online Self-Paced Lessons from HelpTeaching.com

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.

Lessons labeled with use Help Teaching original videos and are accessible to Pro subscribers only. Become a Pro Subscriber to access these lessons and hundreds of standards aligned worksheets.

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

Astronomy

Lesson Name Grade Time
help teaching Why Does The Sun Look So Bright? Grade 5 15-30 min assign
help teaching 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
help teaching Solar System Introduction Grade 6 15-30 min assign
help teaching The Inner Planets Grade 6 15-30 min assign
help teaching 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
khan academy Lunar Eclipses Grade 8 15-30 min assign
khan academy Solar Structure Grade 8 15-30 min assign
The Moon's Surface Features Grade 8 15-30 min assign

Biology

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

Chemistry

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

Earth Science

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

Physics

Lesson Name Grade Time
help teaching Push and Pull - A Science Story Kindergarten 15-30 min assign
help teaching The Sandy Beach - A Science Story Kindergarten 15-30 min assign
Absorption and Scattering of Light Grade 8 60-120 min assign
Acceleration Grade 8 60-120 min assign
Applications of Energy Efficiency Grade 8 60-120 min assign
Applications of Nuclear Physics Grade 8 60-120 min assign
Cell Phones 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
Colors of Objects Grade 8 60-120 min assign
Computer Networks Grade 8 60-120 min assign
Concave Mirrors and Convex Mirrors Grade 8 60-120 min assign
Diffraction and Interference of Light Grade 8 60-120 min assign
Efficiency in Machines Grade 8 60-120 min assign
Elastic Force Grade 8 60-120 min assign
Electric Charge and Electric 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
Energy in Cellular Respiration Grade 8 60-120 min assign
Factors Affecting Energy Transfer Grade 8 60-120 min assign
Feedback Loops Grade 8 60-120 min assign
Fluorescent Light and Vapor Light 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
Gravitational Interaction Grade 8 60-120 min assign
Gravity Grade 8 60-120 min assign
Gravity and Motion Grade 8 60-120 min assign
Holograms and Fiber Optics Grade 8 60-120 min assign
Incandescent Light and Neon Light Grade 8 60-120 min assign
Infrared in Modern World Grade 8 60-120 min assign
Interactions of Light Waves Grade 8 60-120 min assign
Interference of Sound Waves Grade 8 60-120 min assign
Introduction to Heat Energy Grade 8 15-30 min assign
Introduction to Interactions & Energy Transfer Grade 8 60-120 min assign
Introduction to Light Grade 8 60-120 min assign
Introduction to Mirrors Grade 8 60-120 min assign
Introduction to Photosynthesis Grade 8 60-120 min assign
Introduction to Waves Grade 8 60-120 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
Laser and Laser Light Grade 8 60-120 min assign
Laser in Today's World Grade 8 60-120 min assign
Lenses Refract Light Grade 8 60-120 min assign
Light Sources Grade 8 60-120 min assign
Light and Color Grade 8 60-120 min assign
Light and Sight Grade 8 60-120 min assign
Liquids Grade 8 60-120 min assign
Loudness Grade 8 60-120 min assign
Magnetic Field and Energy Grade 8 15-30 min assign
Magnetic Interaction and Magnetic Field Grade 8 60-120 min assign
Magnets and Magnetism Grade 8 60-120 min assign
Microscope Grade 8 60-120 min assign
Microwaves and Infrared Waves Grade 8 60-120 min assign
Microwaves in the Modern World Grade 8 60-120 min assign
Mirrors Reflect Light Grade 8 60-120 min assign
Mixing Colors of Light Grade 8 60-120 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
Optical Instruments Grade 8 60-120 min assign
Pitch Grade 8 60-120 min assign
Polarization Grade 8 60-120 min assign
Polarized Light Grade 8 60-120 min assign
Potential Energy Grade 8 60-120 min assign
Projectile Motion Grade 8 60-120 min assign
Properties of Sound Grade 8 60-120 min assign
Properties of Waves Grade 8 60-120 min assign
Radio Grade 8 60-120 min assign
Radio Waves in Television Broadcasting 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
Reflection of Sound Waves Grade 8 60-120 min assign
Refraction of Light Grade 8 60-120 min assign
Role of Waves in Modern Technology Grade 8 60-120 min assign
Satellite Motion Grade 8 60-120 min assign
Solids Grade 8 60-120 min assign
Sound Grade 8 60-120 min assign
Sound Quality 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 Electromagnetic Spectrum 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
Third Law of Thermodynamics & Energy Transfer 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
Types of Waves Grade 8 60-120 min assign
Ultraviolet Rays in Modern World Grade 8 60-120 min assign
Velocity Grade 8 60-120 min assign
Visible Light and Ultraviolet Light Grade 8 60-120 min assign
Wave Interactions Grade 8 60-120 min assign
Wave Interference Grade 8 60-120 min assign
X-Rays and Gamma Rays Grade 8 60-120 min assign
X-Rays and Role of Electromagnetic Radiations Grade 8 60-120 min assign
Zeroth Law of Thermodynamics & Energy Transfer Grade 8 15-30 min assign
help teaching Acceleration Grade 10 45-90 min assign
help teaching Boyle's Law Grade 10 60-120 min assign
khan academy Capillary Action Grade 10 60-120 min assign
help teaching Charles' Law Grade 10 60-120 min assign
khan academy Doppler Effect Grade 10 60-120 min assign
khan academy Elastic Potential Energy Grade 10 60-120 min assign
khan academy Electromagnetic Spectrum Grade 10 60-120 min assign
Force Diagrams Grade 10 60-120 min assign
khan academy Inclined Planes Grade 10 60-120 min assign
help teaching Laws of Motion Grade 10 60-120 min assign
Momentum and Collisions Grade 10 60-120 min assign
help teaching Newton's Law of Universal Gravitation Grade 10 45-90 min assign
help teaching Position vs. Time Graphs Grade 10 45-90 min assign
help teaching Power Grade 10 45-90 min assign
help teaching Refraction of Light Grade 10 60-120 min assign
help teaching Resistance and Ohm's Law Grade 10 60-120 min assign
Simple Harmonic Motion Grade 10 60-120 min assign
help teaching Speed and Velocity Grade 10 60-120 min assign
khan academy Static Electricity Grade 10 60-120 min assign
help teaching Surface Tension Grade 10 60-120 min assign
help teaching Work Grade 10 45-90 min assign
help teaching Electromagnetic Spectrum Grade 11 60-120 min assign
help teaching Hooke's Law Grade 11 60-120 min assign
help teaching Pulleys Grade 11 60-120 min assign
Torque Grade 11 60-120 min assign
Alpha Decay Grade 12 60-120 min assign
Applications of Momentum Conservation Grade 12 60-120 min assign
Arrangement of Elements in Periodic Table Grade 12 60-120 min assign
Avogadro's Law Grade 12 60-120 min assign
Beta Decay Grade 12 60-120 min assign
Center of Mass and Momentum Grade 12 60-120 min assign
Chemical Kinetics Grade 12 60-120 min assign
Collision Theory of Chemical Reactions Grade 12 60-120 min assign
Conservation of Momentum Grade 12 60-120 min assign
Contact Forces and Non-Contact Forces Grade 12 60-120 min assign
Covalent Bond Grade 12 60-120 min assign
Electrostatics and Electric Field Grade 12 60-120 min assign
Energy Transfer in a Chemical Reaction Grade 12 60-120 min assign
Factors Affecting Reactivity of Elements Grade 12 60-120 min assign
Factors Affecting the Rate of Reaction Grade 12 60-120 min assign
Force and Motion Grade 12 60-120 min assign
Gamma Decay Grade 12 60-120 min assign
Half Life and Mean Life Grade 12 60-120 min assign
How to Calculate a Molar Mass Grade 12 60-120 min assign
Hydrogen Bonding Grade 12 60-120 min assign
Impulse and Momentum Grade 12 60-120 min assign
Integrated Rate Equation Grade 12 60-120 min assign
Introduction to Chemical Bonds Grade 12 60-120 min assign
Introduction to Chemical Reaction Grade 12 60-120 min assign
Introduction to Forces Grade 12 60-120 min assign
Introduction to Gases Grade 12 60-120 min assign
Introduction to Nuclear Processes Grade 12 60-120 min assign
Introduction to Solids Grade 12 60-120 min assign
Ionic Bond Grade 12 60-120 min assign
Limitations of Newton's Second Law Grade 12 60-120 min assign
Liquids Grade 12 60-120 min assign
Magnetic Field Grade 12 60-120 min assign
Magnetism and Magnetic Force Grade 12 60-120 min assign
Mass Defect and Nuclear Binding Energy Grade 12 60-120 min assign
Measurable Properties and Electrical Forces Grade 12 60-120 min assign
Metallic Bond Grade 12 60-120 min assign
Mole and Molar Mass Grade 12 60-120 min assign
Momentum Grade 12 60-120 min assign
Neutrinos and Antineutrinos Grade 12 60-120 min assign
Newton's First Law of Motion Grade 12 60-120 min assign
Newton's Law of Universal Gravitation Grade 12 60-120 min assign
Newton's Second Law of Motion Grade 12 60-120 min assign
Newton's Third Law of Motion Grade 12 60-120 min assign
Non-Ionizing Radiations Grade 12 60-120 min assign
Nuclear Fission Grade 12 60-120 min assign
Nuclear Force Grade 12 60-120 min assign
Nuclear Fusion Grade 12 60-120 min assign
Nucleons and Isotopes Grade 12 60-120 min assign
Numbers and Charges in Stable Ions Grade 12 60-120 min assign
Periodic Table and Properties of Elements Grade 12 60-120 min assign
Polar and Nonpolar Covalent Bond Grade 12 60-120 min assign
Properties of Metallic Bond Grade 12 60-120 min assign
Radioactive Decay Grade 12 60-120 min assign
Radioactive Decay Law Grade 12 60-120 min assign
Rate Constant and Half Life Grade 12 60-120 min assign
Reactivity of Elements Grade 12 60-120 min assign
Rutherford's Atomic Model Grade 12 60-120 min assign
Structure of Atom Grade 12 60-120 min assign
Types and Properties of Hydrogen Bonding Grade 12 60-120 min assign
Types of Chemical Reaction Grade 12 60-120 min assign
Valence Electrons Grade 12 60-120 min assign
help teaching Wave Speed Grade 12 60-120 min assign

Scientific Methods and Applications

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