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 Sports science online courses. Find the best Sports science training programs and enhance your skills today!
A Grade 8 PSSA Science study guide combining exam-aligned lessons, quizzes, and flashcards across life, physical, environmental, Earth, and space science.
Prepare for CSET Social Science Subtest II through a survey of U.S. history and geography, practice questions, and full-length tests.
A broad Praxis Biology and General Science review covering biology, chemistry, physics, Earth science, astronomy, and science principles.
Test-prep lessons and practice quizzes cover U.S. and world history, government, economics, geography, psychology, sociology, and anthropology for the MEGA Social Science Multi-Content exam.
A chapter-aligned physical science review course covering matter, energy, forces, waves, Earth, and the universe.
A video-and-quiz study guide covering life, physical, Earth, and space science for the MTTC Integrated Science (Secondary) exam.
An 8th-grade survey of Earth’s structure, geologic processes, atmosphere, climate, and the solar system for science study and test preparation.
Prepare for the CSET Social Science exam through video lessons, practice questions, full-length tests, and broad coverage of history, government, economics, and geography.
A high school homeschool survey of physical science covering core chemistry, physics, and astronomy concepts through video and text lessons, assignments, and projects.
Prepare for the MTEL Middle School Mathematics/Science exam through broad review of math, physical science, biology, Earth science, and practice exams.
A regional guide to national and U.S. state science standards for teachers planning science curricula.
An introductory survey of matter, motion, forces, energy, waves, light, and the electromagnetic spectrum for 6th grade physical science.
Review eighth-grade chemistry, physics, earth and space science, and biology concepts through STAAR-focused practice and flashcards.
Prepare for the FTCE Family and Consumer Science 6–12 exam with video lessons, realistic practice questions, and full-length tests.
An accessible 7th-grade life science survey spanning cells, ecology, genetics, evolution, human body systems, health, and plant reproduction.
Get personalized course recommendations, track subjects and courses with reminders, and more.