PhysicsGraph

Name: PhysicsGraph
Brand: Lemnisket Inc.

by Lemnisket Inc. (website )

Adaptive physics platform using spaced repetition and AI-graded free response. Founded by Chris Sutherland, PhD (USC physics lecturer). Covers AP Physics 1, University Physics, and Quantum Computing.

Best Fit For

Self-motivated high school students comfortable with technology who prefer interactive, adaptive learning over passive video lectures.

Not Recommended For

Students who need a warm instructor presence or families seeking a curriculum with a long homeschool track record and extensive community reviews.

What Reviewers Say

PhysicsGraph is a newer adaptive physics platform from Lemnisket Inc., founded by Chris Sutherland (Physics PhD, former USC lecturer). It uses text-based lessons with animations, spaced repetition, and AI-graded free-response questions rather than the traditional video-lecture model common in homeschool physics. The platform covers AP Physics 1, algebra-based University Physics, and Quantum Computing. Parent reviews are limited given its relative newness in the homeschool market. The adaptive approach and knowledge-graph pedagogy are promising, but the platform lacks the long track record of established competitors like Physics Prep or Derek Owens.

How It Works

Students work through physics concepts via text-based lessons with animations and diagrams. The platform adapts difficulty based on performance using spaced repetition algorithms. Free-response questions are AI-graded for immediate feedback. Sessions are self-paced, typically 45-60 minutes. Parents monitor progress via a dashboard but do not teach or grade.

Switching to This?

No formal placement test. Students can begin at foundational concepts. Math prerequisites vary by course level — AP Physics 1 requires at least Algebra II. The self-paced format allows mid-year starts.

Curriculum Details

Price: $199 - $599
Grades: 9 - 12
Available As: Digital Internet required
Coverage: Single subject
Subjects: Science
Pacing: Self-paced
Parent Time: 0-5 min/day
Parent Involvement: None
Student Independence: Fully independent
Academic Level: Advanced
Worldview: Secular

Online School Details

Delivery Format:: Asynchronous self paced
Enrollment:: Year round anytime

Reviews We Consulted

Frank Hecker

Highly recommends the platform for its rigorous "finely-scaffolded" mastery model, noting its successful application of a knowledge-graph approach to complex physics topics.

"Both PhysicsGraph and Math Academy embody these dependencies in a 'knowledge graph' for each course, a directed acyclic graph of individual topics... This help ensure that students can fully master a given topic before going on to the next."

Atrium

Offers an enthusiastic endorsement of the quantum computing course, particularly for students who already enjoy similar mastery-based systems like Math Academy.

"I loved using mathacademy and when I heard there was one for physics I instantly hopped on. Their quantum course was wonderful!"

Updated: April 2026

How This Compares

Unlike Physics Prep (Dr. Jack Kernion) and Derek Owens, PhysicsGraph is not video-based — it uses text, animations, and adaptive problem sets. Its spaced-repetition approach is closer to platforms like Math Academy than to traditional homeschool science curricula. Less established in the homeschool community than either competitor.

Getting Started

See What It Looks Like

Mastery learning and spaced repetition system overview · physicsgraph.com

Details the educational philosophy and sequencing logic used to ensure students retain complex physics concepts.

Visit Lemnisket Inc. Website

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