Courses from 1000+ universities
AI got cheap enough that Duolingo’s most expensive plan may not survive it. I read the earnings call transcript and opened the app to see what is actually changing for learners.
600 Free Google Certifications
Computer Science
IT & Networking
Cybersecurity
Ecology and Wildlife Conservation
Comprendere la filosofia
FinTech Ethics and Risks
Organize and share your learning with Class Central Lists.
View our Lists Showcase
Explore a wide range of free and certified Forensic science online courses. Find the best Forensic science training programs and enhance your skills today!
Review core science concepts and practice analyzing scientific information for the MEGA Elementary Education Science Subtest.
Exam preparation spanning physics, chemistry, Earth and space science, laboratory methods, and science classroom instruction.
A middle-school life science survey covering cells, genetics, evolution, ecosystems, organisms, human systems, plants, and environmental concerns.
Interactive flashcards review general science vocabulary and concepts across astronomy, engineering, physics, thermodynamics, and scientific principles.
Review U.S. and world history, geography, government, economics, and social sciences for the ILTS Middle Grades Social Science exam.
A self-paced study guide for the TECEP Science of Nutrition exam covering nutrient chemistry, physiology, metabolism, health, and food safety.
A comprehensive review of life, Earth, and space science concepts for the GACE Science Test II.
Prepare for the high school MCAS Chemistry exam through concise lessons, quizzes, flashcards, and a practice test covering core chemistry topics.
Video-based preparation for Oklahoma’s OSAT Middle Level Science certification exam, covering core biology, chemistry, physics, astronomy, and scientific inquiry.
Review foundational scientific concepts and practice for the ICAS Science – Paper F exam through video lessons, self-assessments, flashcards, and a practice test.
Survey foundational physics and chemistry, from Newton’s laws, energy, waves, electricity, and magnetism to atoms, reactions, gas laws, and laboratory basics.
An accelerated pre-middle-school introduction to Earth science spanning Earth’s spheres, tectonics, ecosystems, resources, and investigation.
A short, accessible survey of social science and humanities spanning psychology, political science, famous people, and prehistoric times.
A broad general-science review spanning chemistry, geography, astronomy, health, physics, Earth science, and prehistory, with practice for topic-specific assessments.
Prepare for the AEPA NT303 Social Science exam with concise lessons and practice covering history, geography, government, politics, and economics.
Get personalized course recommendations, track subjects and courses with reminders, and more.