Learn today. Build tomorrow. Explore free, PLF-approved resources by subject — review lessons, practice skills, and build confidence at your own pace.
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View resources →Motion · Forces · Energy · Electricity · Waves
View resources →Topics · Thesis · Outlines · Citations · Editing
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View resources →Time Management · Note-Taking · Test Prep · Strategy
View resources →Games · Challenges · Simulations · Experiments
Explore →Lessons, videos & explanations
Practice problems & skill building
Games, simulations & interactive learning
Stuck on homework right now?
Use online tools to help you learn — not to replace your learning. More on academic integrity
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Step-by-step lessons, videos, examples, and practice across high-school mathematics.
Free lessons, examples, study materials, and practice across high-school mathematics.
Free online mathematics textbooks for students who need more detailed explanations and reference material.
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Free lessons and practice designed to strengthen reading comprehension, grammar, vocabulary, and language skills.
Free instructional resources covering grammar, punctuation, sentence structure, academic writing, research, and more.
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Free lessons, explanations, videos, and practice across major science subjects.
Lessons and practice across biology, chemistry, earth science, and other STEM subjects.
Free interactive science and math simulations that let students explore concepts by changing variables and observing what happens.
Free science textbooks covering biology, chemistry, anatomy and physiology, astronomy, and physics.
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Free physics lessons, explanations, videos, and practice.
Interactive simulations covering motion, forces, energy, electricity, waves, and other physics concepts.
Free physics textbooks and learning materials for high-school and college-level study.
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Learn about the writing process, academic writing, organization, sentence structure, grammar, mechanics, and revision.
Learn how to research responsibly and properly cite sources using common academic citation styles.
Online tools — including AI — can help you understand difficult concepts, brainstorm ideas, study, organize your thinking, and improve your work. The work you submit should be your own. Always follow your school's rules regarding AI, citations, collaboration, and outside assistance.
Levels below reflect software familiarity, not grade level.
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Official Microsoft learning resources covering Excel basics, formulas and functions, formatting, data organization, charts, and more.
Hands-on Microsoft templates that help students practice common Word, Excel, and PowerPoint skills.
Learn how to create, format, edit, save, and work with documents.
Go to resource ↗Learn how to create slides, work with layouts and visuals, design presentations, and prepare to present.
Go to resource ↗Sometimes moving forward means going back and strengthening a skill you missed. That's part of learning.
A free resource that helps students develop skills for academic success, including studying, time management, goal setting, test preparation, and becoming a more independent learner.
Try a game, experiment, simulation, or interactive activity. Learning doesn't always have to feel like homework.
Not sure where to begin? Start here.
Practice math and science through quests, challenges, battles, games, and interactive activities.
Explore science and math by experimenting with interactive simulations. Change variables, test ideas, and see what happens. Covers forces, motion, electricity, energy, waves, chemistry, and math.
Explore space, Earth science, engineering, technology, and other STEM topics through NASA learning activities, challenges, interactive resources, and games.
Learning takes practice. If something doesn't make sense the first time, try another explanation, work through a practice problem, or explore an interactive activity. Sometimes a different approach is all it takes for a concept to click.
