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✦ Free & open sourceEducation

Oppia

Free online learning tool where interactive activities act like a one-to-one tutor.

Interactive lessons that react to answers

Free basic maths lessons and a tool for creating your own explorations.

Free forever · open source · Apache-2.0
✓ Needs IT✓ Browser-based✓ Real-time collaboration
6.5
ZEKAI
Free interactive maths lessons
Free & open source · Education
Ease of setup3
Usefulness6
Maintenance9.5
Community7.5
★ 6,988
GITHUB
Nov 2026
UPDATED
Apache-2.0
LICENSE
🛠 Don't want to self-host? We can set it up →
⚡ Quick answer

Oppia is a free online learning platform whose activities, called explorations, simulate a conversation with a tutor. It suits learners who want free practice and creators who want to publish interactive lessons.

Runs on
Web
Hosting
Cloud or self-host
Languages
Python
License
Apache-2.0

What it is

Per the repository, Oppia lets anyone create and share interactive activities. Learners get feedback as they answer, and the project offers free lessons on basic mathematics at oppia.org, with plans for science and financial literacy.

Who it's for

It suits learners of basic maths and volunteer creators of lessons. It does not suit universities needing grading, enrolment and reporting; running your own copy is a developer task.

Key features

Explorations

Interactive activities that simulate a tutor conversation.

Feedback on answers

Learners learn by doing and receive responses.

Free maths lessons

Basic mathematics lessons are published on oppia.org.

Creator tools

Anyone can create and share an exploration.

Apache-2.0 code

Permissive licence for the whole codebase.

Python and Angular stack

Built on Python, Angular and Google App Engine.

How to start

Up and running in 3 steps

1
Go to oppia.org and try a maths lesson.
2
To create your own, open the creator tools on the site and build an exploration.
3
To run it yourself, follow the Installing Oppia guide linked from the repo.
Real talk

Our honest verdict

What's great

  • Free lessons you can use on the hosted site with no setup.
  • Apache-2.0 allows commercial reuse.
  • Lessons give feedback instead of just showing content.
  • Active development with a large contributor base.

Where it falls short

  • The published lessons cover basic mathematics, with other subjects only planned.
  • Running your own copy means a Python, Angular and Google App Engine codebase aimed at contributors.
  • It is not a full LMS with enrolment, gradebook or certificates.
  • Content quality depends on volunteers.
Cost

Pricing & license

Free under Apache-2.0, and the lessons on oppia.org are free. The README shows no paid plan; running your own copy costs only your own infrastructure and time.

Paid work

Open remote AI-training roles

879 open remote AI-training roles, updated November 15, 2026; most pay $20–$175 an hour. Zekai lists them free; the application goes to the employer’s platform.

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Questions

FAQ

Is Oppia free?

Yes. The oppia.org lessons are free and the code is Apache-2.0.

What subjects does it teach?

The repo says its free lessons cover basic mathematics, with basic science and financial literacy planned.

Can I self-host Oppia?

The README links an Installing Oppia guide, but the stack is Python, Angular and Google App Engine, so expect developer-level setup.

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