CK-12 FlexBook 2.0 vs Diffit

CK-12 FlexBook 2.08.5Visit Diffit7.8Visit

Higher score CK-12 FlexBook 2.0 #4 in Google Workspace Teacher Resources Software 8.5/10 Free plan Free plan✓ 0 of 1 features Visit CK-12

vs

Diffit #8 in Google Workspace Teacher Resources Software 7.8/10 Free plan Free plan✓ 1 of 1 features Visit Diffit

• CK-12 FlexBook 2.0 fits best

  Free K–12 science lessons and practice

• Diffit fits best

  Teachers adapting materials for Google apps

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Side by side

Feature	CK-12 FlexBook 2.0 8.5/10 Visit ↗	Diffit 7.8/10 Visit ↗
At a glance
Editor score	8.5	7.8
Ranking	#4 in Google Workspace Teacher Resources Software	#8 in Google Workspace Teacher Resources Software
Best for	Free K–12 science lessons and practice	Teachers adapting materials for Google apps
Pricing model	Free	Free plan + paid
Starting price	Free plan	—
Free plan	✓	✓
Free trial	—	—
Deployment	Cloud	Cloud
Platforms	Web	Web
Support	Email, Community, Docs	Email, Docs
Integrations	6 integrations	5 integrations
Built for	Small business, Mid-market, Enterprise	Solo, Small business, Mid-market, Enterprise
Features CK-12 FlexBook 2.0 0/1 · Diffit 1/1
Google Classroom integration	Not checked yet	✓ (best)
Specs
Workspace apps	Not checked yet	Google Docs, Google Slides, Google Forms, Google Classroom
Resource types	Not checked yet	Differentiated activities, station materials, skills practice, intervention materials, slides, graphic organizers, classroom-ready resources
Resource library size	Not checked yet	Not checked yet
Sharing controls	Not checked yet	Download PDF, print, share with colleagues, export to Google Classroom, export to Google Docs/Slides/Forms, export to Microsoft 365
Our review
Pros	Customizable FlexBooks let teachers rearrange chapters and add materials. Interactive lessons include videos, simulations, PLIX activities, and practice. Google Classroom and LMS integrations support assignments and grade passback.	Generates resources from topics, standards, text, PDFs, URLs, or video transcripts Adjusts reading levels, activities, translations, and scaffolds with Diffit Chat Exports to Google Docs, Slides, Forms, and Classroom
Cons	Its verified subject scope is limited to K–12 science. The platform is delivered through a web browser rather than native apps. LMS connectivity is centered on a defined set of supported integrations.	Basic access limits content to resources made in the last 90 days Google and Microsoft exports and advanced features require a paid plan School and district pricing is quote-based
Our verdict	CK-12 FlexBook 2.0 is a browser-based platform for students, teachers, parents, and schools seeking free K–12 science curriculum. Teachers can customize digital textbooks, rearrange chapters, add materials, assign lessons, create quizzes,… Read the review →	Diffit helps teachers turn topics, standards, prompts, pasted text, PDFs, URLs, and video transcripts into classroom materials. It is aimed at educators who need differentiated activities, station materials, skills practice, slides, or… Read the review →

Strengths and trade-offs

• CK-12 FlexBook 2.0 — where it wins

  • Customizable FlexBooks let teachers rearrange chapters and add materials.
  • Interactive lessons include videos, simulations, PLIX activities, and practice.
  • Google Classroom and LMS integrations support assignments and grade passback.

  Where it doesn't

  • Its verified subject scope is limited to K–12 science.
  • The platform is delivered through a web browser rather than native apps.
  • LMS connectivity is centered on a defined set of supported integrations.

• Diffit — where it wins

  • Generates resources from topics, standards, text, PDFs, URLs, or video transcripts
  • Adjusts reading levels, activities, translations, and scaffolds with Diffit Chat
  • Exports to Google Docs, Slides, Forms, and Classroom

  Where it doesn't

  • Basic access limits content to resources made in the last 90 days
  • Google and Microsoft exports and advanced features require a paid plan
  • School and district pricing is quote-based

• CK-12 FlexBook 2.08.5/10 · Free plan

  A free K–12 science platform combining editable textbooks, simulations, practice, and assessment tools.

  Visit CK-12Full verdict →
• Diffit7.8/10 · Free plan

  Create adaptable classroom materials from varied inputs and export them to Google apps.

  Visit DiffitFull verdict →