Side by side

CENTURY vs Illustrative Mathematics

Both stand on k-12 curriculum platforms. Which one you can start free with, which one lets you read the code, and what each costs once you pay.

CENTURY

Free trial Web

CENTURY offers adaptive lessons and reporting across several education settings. Its plan scope, learner limits and per-learner pricing matter when choosing an option.

Visit CENTURY

Schools looking for a free, full-year mathematics curriculum with a coherent sequence and built-in classroom resources should consider IM Math through AccessIM. Schools seeking print materials, enhanced digital platforms, or implementation support can look to its IM Certified partners.

Visit Illustrative Mathematics

The facts

	CENTURY	Illustrative Mathematics
Free plan	A free trial	Yes
Open source	Not published	Not published
Runs on	Web	Web
Lowest paid plan	CENTURY Core: £12.49 per learner a month	Free or on request
Plans published	4	1
Maker	Not published	Not published
Website	century.tech	illustrativemathematics.org
On k-12 curriculum platforms	#14 of 29	#10 of 29

CENTURY: what it does well

Personalizes study recommendations from learner performance
Combines video, slides and self-marking questions
Supports school, home-learning and post-16 users
Offers a free four-week school pilot
Works on tablets, laptops and desktops

What to know first

No free plan
Parent Core covers only Years 3–11
Web-only platform
Generative AI features require teacher approval

Illustrative Mathematics: what it does well

Full TK–12 curriculum is available online at no cost.
IM Math v.360 sequences content through Algebra 2.
Includes assessments, checkpoints, and lesson cool-downs.
Provides supports for English learners and students with disabilities.
Common Core State Standards aligned.

What to know first

Enhanced digital platforms and print materials are offered through partners.
No free trial is offered.

Alternatives to CENTURY Alternatives to Illustrative Mathematics The whole list