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This shared foundation keeps its app tools together while linking back to the complete OneLinkUS website.
Learning lessons and study aids are an evolving preview. AI, capture and saving capabilities may require sign-in or additional verification; this is not a completed accredited school or tutoring service.
Connect lessons and AI tutoring to job preparation, interviews and workplace skill growth.
Accessible OpportunityAsk for definitions, pronunciation guidance, examples, simpler explanations, translations and how a word is used in a subject.
Open Dictionary AIFuture OneLinkUS school concepts can combine classrooms with laboratories, gardens, nature and animal-learning environments, technology, arts, accessibility and practical projects. Any real school, laboratory, garden or animal facility would require qualified educators, safety systems, licensing, accessibility planning and applicable education, health and animal-welfare rules before opening.
The selected lesson stays central so you can read, practice, take its matching quiz and save demonstrated mastery.
Lessons are organized by school level. Schools and universities can sequence topics differently, so use this as a structured learning path rather than a claim about one specific school's official curriculum.
Learn how sounds, words, sentences, evidence and structure work together so you can understand texts and communicate clearly.
What this means: A clause contains a subject and a verb. An independent clause can stand alone as a complete thought; a dependent clause cannot. Subject–verb agreement means the verb matches a singular or plural subject. Punctuation helps readers see where ideas join or separate.
Why it matters: Learn how sounds, words, sentences, evidence and structure work together so you can understand texts and communicate clearly.
Try it: Guided practice: In “Although it was raining, the team practiced,” identify the dependent clause and the independent clause. Then explain why the comma belongs between them.
Visual walkthrough: A clause contains a subject and a verb. An independent clause can stand alone as a complete thought; a dependent clause cannot. Subject–verb agreement means the verb matches a singular or plural subject. Punctuation helps readers see where ideas join or separate.
When an approved lesson video is available, it appears here with captions and transcript. This guided visual walkthrough remains available for every lesson.
What to do: Read the explanation, work the guided practice, then use the quiz and Learning AI to check your understanding.
Which sentence has correct subject–verb agreement?
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No single page can contain every fact in every field. These subject paths are designed as entrances into deeper lessons, with Learning AI able to continue into narrower subtopics, prerequisites, exercises and advanced study.
phonics, vocabulary, comprehension, grammar, writing, research, storytelling, literature
number sense, arithmetic, fractions, algebra, geometry, trigonometry, statistics, probability, calculus, discrete math
motion, forces, energy, waves, heat, electricity, magnetism, optics, relativity, quantum, nuclear, particle, astrophysics
atoms, bonding, reactions, stoichiometry, thermochemistry, equilibrium, organic, inorganic, analytical, physical chemistry
cells, genetics, evolution, anatomy, physiology, ecology, microbiology, neuroscience, public-health foundations
geology, weather, climate, oceans, astronomy, planetary science, stars, galaxies, cosmology
mechanical, electrical, civil, structural, chemical, aerospace, robotics, systems, CAD, design process
digital literacy, logic, web development, programming, databases, cybersecurity, networks, AI literacy, data science
world history, national histories, government, civics, institutions, primary sources, historical reasoning
countries, regions, maps, physical geography, human geography, languages, cultures, migration, global systems
microeconomics, macroeconomics, entrepreneurship, accounting, operations, marketing, management, trade
budgeting, saving, banking, credit, taxes, investing basics, insurance, consumer decisions, business money
speaking, listening, writing clearly, AAC-friendly practice, presentations, negotiation, conflict resolution
reading, listening, speaking, grammar, vocabulary, pronunciation, translation practice, cultural context
drawing, design, music, rhythm, photography, video, storytelling, creative projects, art history
reasoning, arguments, evidence, fallacies, ethics, philosophy, decision-making, media literacy
legal systems, rights, courts, public services, contracts basics, government processes, civic participation
tools, measurement, electricity basics, construction concepts, automotive basics, maintenance, safety, technical reading
planning, time, self-advocacy, safety, transportation, household tasks, forms, appointments, organization
Physics can be learned from beginner level through university-style topics. Learning AI should connect each idea to the math required, explain concepts before equations when helpful, show worked examples, check units, give practice and make clear where simplified models stop being accurate.
units, dimensions, estimation, significant figures, vectors, graphs, scientific notation, uncertainty, experiments
algebra, geometry, trigonometry, vectors, functions, derivatives, integrals, differential equations, linear algebra, probability
position, velocity, acceleration, Newton's laws, friction, momentum, collisions, work, energy, power, rotation, gravity, orbits
density, pressure, buoyancy, continuity, Bernoulli principle, viscosity, flow, aerodynamics and hydrodynamics foundations
simple harmonic motion, resonance, mechanical waves, sound, interference, standing waves, Doppler effect
temperature, heat, kinetic theory, ideal gases, first and second laws, entropy, engines, refrigeration, phase changes
charge, electric fields, voltage, current, resistance, circuits, capacitance, magnetic fields, induction, Maxwell's equations foundations
reflection, refraction, lenses, mirrors, diffraction, interference, polarization, geometric and wave optics
special relativity, spacetime, time dilation, length contraction, mass-energy, general-relativity concepts, gravity as geometry
wave-particle duality, uncertainty, wavefunctions, probability, quantization, tunneling, spin, atoms and quantum systems
atomic structure, spectra, radioactivity, nuclear reactions, fission, fusion, fundamental particles, fields, Standard Model overview
solids, crystals, semiconductors, conductors, insulators, superconductivity, material properties, nanoscience foundations
ionized matter, charged-particle motion, magnetic confinement, space plasmas, fusion-plasma foundations
stars, stellar evolution, black holes, galaxies, dark matter, expansion, cosmic background, structure of the universe
data analysis, simulation, numerical methods, sensors, laboratory design, uncertainty, reproducibility, scientific communication
electronics, energy systems, medical imaging, acoustics, photonics, materials, robotics, aerospace and engineering applications
Ask Learning AI things like “Teach me physics from the beginning,” “Build me a high-school physics course,” “Teach Newton's laws with examples,” “Prepare me for calculus-based mechanics,” “Explain quantum mechanics simply first, then mathematically,” or “Quiz me on electricity and magnetism.”
Birthday visibility stays private for child and teen accounts. Adult-only content is gated away from underage accounts.
New messaging rules use age bands, blocks and active guardian relationships before a conversation can be created.
AI can break a task into steps, explain why a step matters, give practice, then reduce help as the learner improves.
Voice, visual, keyboard, screen-reader, read-aloud, no-timer, text-size, contrast, language and caption pathways can be selected without labeling the person.