CK-12 FlexBook 2.0 vs PraxiLabs

CK-12 FlexBook 2.09.3Visit PPraxiLabs8.2Visit

Higher score CK-12 FlexBook 2.0 #2 in Science Learning Software 9.3/10 Free plan Free plan✓ 3 of 4 features Visit CK-12

vs

P PraxiLabs #11 in Science Learning Software 8.2/10 30-day trial Free trial✓ 4 of 4 features Visit PraxiLabs

• CK-12 FlexBook 2.0 fits best

  Schools wanting a fully free science platform

• PraxiLabs fits best

  Individuals seeking affordable 3D virtual labs

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Side by side

Feature	CK-12 FlexBook 2.0 9.3/10 Visit ↗	PPraxiLabs 8.2/10 Visit ↗
At a glance
Editor score	9.3	8.2
Ranking	#2 in Science Learning Software	#11 in Science Learning Software
Best for	Schools wanting a fully free science platform	Individuals seeking affordable 3D virtual labs
Pricing model	Free	Paid
Starting price	Free plan	$44.99/user/yr
Free plan	✓ (best)	—
Free trial	—	30 days
Deployment	Cloud	Cloud
Platforms	Web	Web
Support	Email, Community, Docs	Email · 24/7
Integrations	6 integrations	3 integrations
Built for	Small business, Mid-market, Enterprise	Solo, Small business, Mid-market, Enterprise
Features CK-12 FlexBook 2.0 3/4 · PraxiLabs 4/4
Interactive simulations	✓	✓
Virtual experiments	Not checked yet	✓ (best)
Guided lessons	✓	✓
Assessment tools	✓	✓
Specs
Science scope	K-12 science	Multi-subject
Included learners	Not checked yet	1 learners
Supported platforms	Browser on laptop, desktop, Chromebook, tablet, or mobile device	Web browser on a computer or laptop; no installation required
Our review
Pros	Free customizable textbooks with videos, interactives, and practice Physics and chemistry simulations plus adaptive personalized questions Assignments, progress insights, and LMS grade passback support	220+ simulations across biology, chemistry, and physics Guidance, quizzes, analytics, reports, and AI lab assistant Oxi LMS integration with Moodle, Canvas, and Blackboard
Cons	Browser-based access only Science content is focused on K–12 learning Customization and class management are teacher-led	Web access is limited to computers or laptops Advanced institutional tools require teacher or institution plans Paid subscriptions are non-refundable
Our verdict	CK-12 FlexBook 2.0 is a browser-based science learning platform for K–12 students, teachers, parents, and schools. Its core offering combines customizable digital textbooks with interactive lessons, embedded videos, practice activities,… Read the review →	PraxiLabs is a web-based science learning platform built around interactive 3D virtual laboratories. It covers biology, chemistry, physics, and related science branches, making it suitable for individual learners as well as teachers,… Read the review →

Strengths and trade-offs

• CK-12 FlexBook 2.0 — where it wins

  • Free customizable textbooks with videos, interactives, and practice
  • Physics and chemistry simulations plus adaptive personalized questions
  • Assignments, progress insights, and LMS grade passback support

  Where it doesn't

  • Browser-based access only
  • Science content is focused on K–12 learning
  • Customization and class management are teacher-led

• PraxiLabs — where it wins

  • 220+ simulations across biology, chemistry, and physics
  • Guidance, quizzes, analytics, reports, and AI lab assistant Oxi
  • LMS integration with Moodle, Canvas, and Blackboard

  Where it doesn't

  • Web access is limited to computers or laptops
  • Advanced institutional tools require teacher or institution plans
  • Paid subscriptions are non-refundable

• CK-12 FlexBook 2.09.3/10 · Free plan

  A broad, free science platform for schools that want customizable content and classroom tools.

  Visit CK-12Full verdict →
• PPraxiLabs8.2/10 · 30-day trial

  Affordable 3D biology, chemistry, and physics labs with guidance and reporting.

  Visit PraxiLabsFull verdict →