How OpenIntro Keeps Textbooks Free and Affordable

OpenIntro keeps its textbooks free and affordable through a combination of free digital access and paid print sales. Every student using an OpenIntro textbook gets immediate, perpetual, and free access to the PDF, while print editions are sold at affordable prices. Those print sales then fund the nonprofit's ability to expand the number of textbooks it supports. The model works because OpenIntro is a registered 501(c)(3) nonprofit focused on students and teachers rather than shareholder profit.

The Free Digital Core

The central mechanism is simple: the PDF is free, and access is not time-limited. According to OpenIntro, when a textbook is used, "every student has immediate, perpetual, and free access to the PDF." That removes the most common barrier in college courses, where a required text may be unavailable until a student pays for it or waits for a library copy.

This matters because the cost problem is widespread. OpenIntro cites that 65% of students have opted out of buying a college textbook due to its high price, and 94% of those students know they suffer academically from that decision. A free PDF available from day one addresses both the financial and academic sides of that trade-off.

Affordable Print, Not a Paywall

OpenIntro does not treat print as the "real" product behind a digital teaser. Each book is described as affordable in print, and the print edition is an alternative format rather than a requirement. A student who prefers paper can buy it; a student who cannot or does not want to pay still has the full PDF.

The practical result is that instructors can assign an OpenIntro text without creating a situation where some students have the material and others do not.

Print Sales Fund Expansion

The financial sustainability piece is what separates this from a one-time giveaway. OpenIntro states that print book sales make it financially possible to expand the number of textbooks it supports. In other words, revenue from students and readers who choose print is reinvested into producing and maintaining more free titles.

This is a cross-subsidy model: paid print buyers sustain the free digital side for everyone else. It also means the catalog can grow over time rather than depending solely on grants or donations.

Nonprofit Structure and Focus

OpenIntro is a registered 501(c)(3) nonprofit. Its stated mission is to make educational products that are free, transparent, and lower barriers to education. Because it is not maximizing profit for shareholders, the organization says it is 100% focused on what is best for students and teachers.

That structure shapes decisions that a commercial publisher might make differently, such as keeping the PDF free and perpetual rather than licensing it per student or per term.

Supporting Resources and Teacher Access

Free and affordable textbooks are the core, but OpenIntro also features supporting resources such as slides and videos. Teachers who become verified can request desk copies, gain access to solutions for statistics textbooks, review sample exams, and more through the Teacher Registration option.

For instructors evaluating the model, the relevant question is whether the free PDF plus affordable print covers their course needs. The answer depends on the subject: OpenIntro's catalog spans statistics and mathematics, including titles such as OpenIntro Statistics, Introduction to Modern Statistics, Advanced High School Statistics, and, in mathematics, College Algebra and Trigonometry, APEX Calculus, and Linear Algebra, with the mathematics titles noted as available via a pilot program.

What to Check Before Adopting

• Confirm the specific title you need is in the current catalog and, for mathematics titles, that the pilot program covers your use.
• Verify the print price for your edition if students will be expected to have paper copies.
• Have instructors register for verified teacher access if desk copies, solutions, or sample exams are needed.
• Note that free PDF access is the documented model; other access details, such as login requirements for specific resources, should be confirmed on the site rather than assumed.

The short version: OpenIntro keeps textbooks free by making the PDF the default and perpetual format, keeps them affordable by pricing print reasonably, and keeps the model going by reinvesting print revenue into more free titles under a nonprofit structure.