Study smarter. Play your way to the A.
Interactive textbooks, games and practice for 27 subjects, from algebra to anatomy and ethics to nursing.
What are you studying for?
Which chamber of the heart pumps blood out to the whole body?
Pick up where you left off
Where are you headed?
Pick a path and we will put the right books, games and practice in front of you.
College courses
Psychology, chemistry, algebra, writing, history and more.
Start here →Nursing school
Assessment, med-surg, mental health and maternal-child, written for NCLEX thinking.
Start here →Health sciences
A&P, pathophysiology, microbiology, pharmacology and nutrition.
Start here →Chiropractic boards
200 cases, 48 exam stations and 266 real radiographs.
Start here →
One topic, everything you need
Search a topic and get the chapter to read, the walkthrough to watch, the practice to review and the game to play. Here is how it works in 40 seconds.
A short animation. A student searches heart failure and sees four kinds of results: textbook chapters to read, animated walkthroughs to watch, flashcards and practice questions to review, and games like PathoQuest to play. Every topic works the same way, across 27 free subjects with no sign-up.
On a phone, tap the full screen button and turn your phone sideways.
Download the intro as a video with music (MP4, 3.2 MB) to share it.
The library
Every book is free to read online or save as a PDF, with labs and interactives for every chapter.
Health Sciences
How the body works, breaks and healsNursing
Assessment and care, system by systemScience and Math
Chemistry, biology, algebra and dataSocial Sciences
Minds, people and societiesWriting and Humanities
Writing, speaking, ethics and historyChiropractic and Spine
Board review and spine careWatch it happen, step by step.
193 animated walkthroughs show what a textbook can only describe: a heartbeat, a titration, a drug finding its receptor, a disease unfolding. Each one comes with a lab to try it yourself.
The Arcade
8 games ready to play now and 11 more on the way. They run in your browser with no download and no account.
Kingdom of Corpus
A pixel adventure across fifteen lands of the body, with physiology shrines, two phase guardians, villager cases and 900 questions.
- 15 lands, one for each body system
- "Why that answer is tempting" on every wrong choice
- Save codes to move your progress between devices
On the wayMicrobiologyMicroQuestSeven pathogen kingdoms. Master 140 microbiology questions under the lens.Five questions a day keeps the cramming away.
A new Daily Challenge every day, mixed from every subject. Answer all five to keep your streak alive. Your streak saves on this device.
Type 1 diabetes is mainly caused by what?
Big test coming?
Practice built for the exams that matter most.
Nursing exams
Med-surg, assessment, mental health and maternal-child books built around clinical judgment and priority questions.
Chiropractic boards
Board style cases, a full practical exam day and a radiograph reading room.
Chemistry finals
A 700 question practice bank with explanations, 1,050 flashcards and eight study guides.
A&P exams
594 flashcards with memory hooks, 168 slide decks and the Kingdom of Corpus adventure.
Pathophysiology
Diseases explained step by step, plus PathoQuest, a strategy game of 60 diseases and how they spread.
Statistics
Every test explained in plain words, with labs for each chapter.
Hi, I'm Dr. Garg.
I have taught college science since 2007. My students kept asking for the same three things: a book that explains it plainly, practice that shows why an answer is right, and a way to review that does not feel like a chore. So I built them, and now they are free for everyone.
No trial, no paywall. A few ads pay for hosting.
Progress stays in your browser. We never ask for your email.
Teachers can reuse and adapt every book.
Read and play on any device with a browser.