Khan Academy – High School Chemistry & AP Chemistry

 

Overview: 

Khan Academy Physics is a free online resource offering a comprehensive introduction to fundamental physics concepts. Designed primarily for high school and early college students, the course covers classical mechanics, electricity and magnetism, thermodynamics, waves and optics, and more. Lessons are delivered through short instructional videos accompanied by quizzes and practice problems.

​

Pros:

• Free and Accessible: Entirely free with no ads or subscription fees. Easily accessible via web or app.

• Clear Explanations: Concepts are broken down into digestible videos with step-by-step walkthroughs.

• Self-paced Learning: Ideal for independent learners; you can start, pause, and revisit topics anytime.

• Practice Questions: Includes multiple-choice and short-answer problems for reinforcement.

• Visual Aids: Animations and diagrams help visualize abstract concepts, especially in mechanics and E&M.

• Aligned with Curriculum: Useful for AP Physics preparation and introductory college-level study.

Cons:

• Limited Depth for Advanced Learners: Lacks the mathematical rigor or advanced topics needed for AP Physics C, university physics majors, or Olympiad-level study.

• Few Real-world Applications: The focus is mainly theoretical; practical or experimental contexts are limited.

• No Live Support: No interaction with instructors or forums for questions—students must rely on self-study or external help.

• Occasional Gaps in Progression: Some learners may find jumps in difficulty between sections without sufficient scaffolding.

​

​

MIT OpenCourseWare

​

Overview:

MIT OpenCourseWare (OCW) – Physics for High School is a free and open collection of materials from MIT’s physics curriculum, tailored to support high school students and teachers. It includes full course content from MIT’s introductory physics courses—like Classical Mechanics and Electricity & Magnetism—with a dedicated “Highlights for High School” section that distills key concepts for pre-college learners.

This resource is designed for ambitious students seeking to deepen their understanding or prepare for college-level physics and exams like AP Physics C or the SAT Subject Test in Physics.

​

Pros:

• High-Quality University Content: Access real MIT courses, including lecture videos, notes, assignments, and exams with solutions.

• Challenging and Enriching: Offers deeper, calculus-based physics—ideal for students preparing for AP Physics C or college.

• Self-Directed Learning: Students can learn at their own pace, with freedom to skip, review, or repeat material.

• Free and Open Access: No cost, no sign-up—fully open educational content.

• Support for Teachers: Materials can be used to enhance classroom teaching or supplement advanced students’ learning.

Cons:

• Not Ideal for Beginners: Content assumes familiarity with algebra, trigonometry, and often calculus—can be overwhelming for early high schoolers or those new to physics.

• No Interactive Features: Lacks interactive simulations or auto-graded practice like those found in Khan Academy or CK-12.

• No Instructor Support: No direct help or community forum—students must work through challenges independently.

• Text-Heavy Format: While the content is rich, it’s less visual or gamified than newer platforms.

CK-12 Chemistry
​

Overview:

CK-12 Chemistry is a free online platform offering comprehensive, interactive content for high school physics. It includes digital "FlexBooks," simulations, real-world applications, videos, and practice problems. The platform covers conceptual and algebra-based physics, making it ideal for general physics courses and introductory AP Physics 1/2 prep. It's widely used by students, homeschoolers, and teachers looking for customizable, standards-aligned science content.

​

Pros:

• Free and accessible with no sign-up or cost

• Includes interactive simulations and videos to enhance learning

• Modular structure with short, focused lessons and quizzes

• Customizable digital textbooks for flexible teaching or self-study

Cons:

• Not suitable for calculus-based physics or advanced learners

• Website interface can be unintuitive or slow at times

• Depth of explanation varies across topics

• No built-in help from instructors or community support

edX-Chemistry

Overview:

edX offers a wide range of physics courses from top universities like MIT, Harvard, and Georgetown. These courses cover everything from high school physics fundamentals to college-level mechanics, electricity and magnetism, and quantum physics. Many are free to audit (with a fee for certification) and include structured modules with video lectures, readings, and assessments.

Popular beginner-friendly courses include:

AP® Physics 1 Essentials (Davidson Next/Harvard)

How Things Work: An Introduction to Physics (University of Virginia)

Mechanics and Waves (MITx)

 

Pros:

• Courses are taught by professors from leading institutions

• High-quality video lectures and well-structured modules

• Free to audit with optional paid certification

• Includes AP-aligned and college-prep content

Cons:

• Some courses require strong math skills, including calculus

• Limited interactivity or support for students auditing the course

• Not all courses are always available for enrollment

• Time commitment may be high for casual learners