Illustrative Mathematics

Illustrative Mathematics is a nonprofit publisher of IM Math, a problem-based, full-year mathematics curriculum for transitional kindergarten through grade 12. It best suits schools and districts that want a coherent standards-aligned sequence, substantial teacher guidance, and printable student materials without a curriculum license fee. Its free AccessIM edition is unusually complete; schools that need managed digital administration, physical packages, or implementation services will need a certified partner.

Overview

IM Math is built around students solving meaningful problems, explaining their reasoning, comparing strategies, and linking ideas across lessons, units, courses, and grade levels. IM Math v.360 provides a continuous progression from transitional kindergarten through Algebra 2, so a district can organize instruction around one sequence rather than stitch together unrelated grade-level materials.

The curriculum aligns with the Common Core State Standards for Mathematics. Illustrative Mathematics says IM v.360 receives all-green EdReports ratings across grade bands and gateways. That combination makes it a strong candidate for schools wanting a defined, standards-based core. The discourse-heavy approach is a better fit for classrooms that prioritize reasoning and mathematical communication than for programs centered on short, independent practice.

Key features

• Full online curriculum: AccessIM includes complete lessons and implementation resources, not merely sample activities, giving teachers a full-year instructional backbone at no charge.
• Teacher and student PDFs: Downloadable, printable materials support classrooms that need paper copies or dependable offline access. They also reduce dependence on a particular learning platform.
• Embedded instructional support: Discussion routines, English-learner supports, and accommodations for students with disabilities are integrated into the curriculum, helping teachers plan for varied learners within the main sequence.
• Assessment checkpoints: Unit assessments, session checkpoints, and lesson cool-downs provide several points for checking understanding rather than waiting for an end-of-unit test.
• Partner technology: Enhanced platforms from Imagine Learning and Kiddom add student rostering and account management, assignment tools, data reporting, and progress monitoring. These functions matter to districts managing many classes, but they are separate from the free core access.
• Professional support: Illustrative Mathematics and IM Certified partners provide professional learning, leadership support, and implementation services for schools and districts adopting the curriculum at scale.

Pricing

The free OER plan is the clear choice for schools able to handle their own printing, accounts, and implementation. There is no stated seat quota or expiration, and no free trial is needed because access is ongoing. Partner purchases make more sense when a district wants packaged print products, centralized rostering, assignments, reporting, progress monitoring, or formal implementation assistance. They also add a procurement step and a cost that the online core avoids.

Platforms

IM Math runs on the web through AccessIM. The curriculum also supports offline use through downloadable PDFs, which is useful where connectivity or device availability is inconsistent. Enhanced digital experiences are supplied by partner platforms rather than by the free AccessIM offering itself.

Who it's for

IM Math is suited to transitional-kindergarten-through-grade-12 schools, districts, and individual educators seeking one coherent mathematics progression with standards alignment, teacher tools, and built-in assessments. It is especially practical for organizations with staff who can manage a web-based OER and print materials as needed. Schools that require a turnkey device platform, automated administration, or bundled physical books should evaluate the certified partners instead.

Pros and cons

Pros

• Comprehensive free scope: A full TK–12 sequence and unlimited access avoid recurring curriculum-license costs.
• Coherent progression: v.360 connects learning from transitional kindergarten through Algebra 2, supporting district-wide planning.
• Classroom-ready support: Routines, learner supports, assessments, checkpoints, and cool-downs are built into the instructional materials.
• Flexible access: Web delivery plus printable PDFs supports both digital and paper classrooms.
• Student privacy posture: Student-facing curriculum can be accessed without registration or login, and the main site says it does not collect student information.

Cons

• Advanced administration is not part of the free core: Rostering, reporting, progress monitoring, and assignment management require a partner platform.
• Physical materials cost extra: Schools wanting packaged print resources must obtain them through certified partners at custom pricing.
• Implementation may require support: Professional learning and leadership services are available, but schools seeking them must work with Illustrative Mathematics or a partner.

Alternatives

For a broader directory of comparable products, see K-12 Curriculum Platforms.

• MobyMax is a better fit for schools wanting Android, iOS, macOS, Windows, and web availability plus a free educator version, though its free access is limited compared with licensed features.
• Khan Academy suits organizations seeking a multi-platform freemium service, including a $10 a year Enterprise Starter plan for U.S. schools and districts with 1,000 or fewer student licenses.
• CK-12 FlexBook 2.0 is preferable when customizable, free digital textbooks are the priority and subject coverage can vary by book.
• Amplify Classroom fits individual educators wanting free interactive K–12 math, literacy, and science lessons with a Teacher Dashboard and Polypad manipulatives.
• EL Education Curriculum is an alternative for educators seeking free language-arts curriculum resources.
• Eureka Math is worth considering for free PreK–12 PDF curriculum and a separate digital suite, with a free trial available.
• Oak National Academy offers a free web and API service with no paywalls, package tiers, or hidden costs.
• OpenSciEd is a free web-based option for educators or parents, with registration required for its curriculum resources.

Verdict

Choose Illustrative Mathematics if your school or district needs a complete, coherent TK–12 mathematics curriculum with built-in supports, assessments, and printable materials at no licensing cost. Look elsewhere when centralized digital administration, bundled print products, or a turnkey implementation package is more important than free, open access.