diff --git a/website/docs/events/m3-slides/.slides/introduction.md b/website/docs/events/m3-slides/.slides/introduction.md
index 24b8016..ddbda1a 100644
--- a/website/docs/events/m3-slides/.slides/introduction.md
+++ b/website/docs/events/m3-slides/.slides/introduction.md
@@ -1,8 +1,100 @@
---
-## Introduction
+## Open Education Hub
+
+----
+
+![Moodle Block](media/screenshot-os-moodle-block.png)
+
+----
+
+![Moodle Results](media/screenshot-os-moodle-results.png)
+
+----
+
+![GitLab Repositories](media/screenshot-os-gitlab-list.png)
+
+----
+
+![GitLab Submissions](media/screenshot-os-gitlab-submissions.png)
+
+----
+
+![Student Issues](media/screenshot-os-student-submission.png)
+
+----
+
+![Student Contributions](media/screenshot-os-student-contrib.png)
+
+----
+
+![Automate Everything](media/automate-everything.jpg)
+
+----
+
+![Simplify Everything](media/simplify-everything.jpg)
+
+----
+
+![Reuse Everything](media/reuse-everything.jpg)
+
+----
+
+![Document Everything](media/document-everything.jpg)
+
+----
+
+![Publicize Everything](media/publicize-everything.jpg)
+
+----
+
+![Involve Everyone](media/involve-everyone.jpg)
+
+---
+
+## Open Educational Resources (OER)
+
+![OER](media/screenshot-openeduhub-oer.png)
+
+---
+
+## What's Different?
+
+![What's Different](media/openedu-different.svg)
+
+----
+
+### Vision
+
+methodology
+
+umbrella organization
+
+certified content and infrastructure
+
+----
+
+### Team
+
+software & computer systems engineering
+
+continuous teaching improvement
+
+vibrant community
+
+----
+
+### Tools of the Trade
+
+- [(GitHub Flavored) Markdown](https://github.github.com/gfm/)
+- [reveal-md](https://github.com/webpro/reveal-md)
+- [Docker containers](https://www.docker.com/)
+- [GitLab pipelines](https://docs.gitlab.com/ee/ci/pipelines/)
+- Linters, compliance checkers
+- Integration of all kinds (GitHub, GitLab, Moodle, TutorWeb etc.)
---
-### What we do at OEH
+## Terms
+![Terms](media/openedu-terms.svg)
diff --git a/website/docs/events/m3-slides/.slides/os-materials.md b/website/docs/events/m3-slides/.slides/os-materials.md
index f9f91b4..2d164b4 100644
--- a/website/docs/events/m3-slides/.slides/os-materials.md
+++ b/website/docs/events/m3-slides/.slides/os-materials.md
@@ -1,24 +1,151 @@
---
-## OS materials
+## Operating Systems Content & Resources
----
+- [Presentation](https://open-education-hub.github.io/operating-systems/)
+- [Repository](https://github.com/open-education-hub/operating-systems/)
-### Lecture
+----
----
+### Lectures
+
+![Lecture](media/screenshot-os-lecture.png)
+
+----
+
+### Lectures
+
+![Lecture](media/screenshot-os-repository-lecture.png)
+
+----
+
+### Lectures
+
+- [(GitHub Flavored) Markdown](https://github.github.com/gfm/)
+- [reveal-md](https://github.com/webpro/reveal-md)
+- [Draw.io](https://drawio-app.com) + [ffmpeg](https://ffmpeg.org/)
+- Quizzes
+- Demos
+- Mardown linter, [Super-Linter](https://github.com/github/super-linter)
+- CC BY-SA 4.0
+
+----
### Practical Sessions
----
+![Lab](media/screenshot-os-lab.png)
+
+----
+
+### Practical Sessions
+
+![Lab](media/screenshot-os-repository-lab.png)
+
+----
+
+### Practical Sessions
+
+- [(GitHub Flavored) Markdown](https://github.github.com/gfm/)
+- Source code: solutions, generated skeletons, tests / checkers
+- Quizzes
+- [Super-Linter](https://github.com/github/super-linter)
+- BSD-3-Clause, CC BY-SA 4.0
+
+----
### Quizzes
----
+![Quizzes](media/screenshot-os-quiz.png)
+
+----
+
+### Quizzes
+
+- [(GitHub Flavored) Markdown](https://github.github.com/gfm/)
+- Integration with quiz management engine (Moodle, TutorWeb etc.)
+- Spread in Lectures and Practical Sessions
+- Public and private repositories
+
+----
### Demos
----
+![Demo](media/screenshot-os-demo.png)
+
+----
+
+### Demos
+
+- Source code
+- Used in Lectures
+- [Super-Linter](https://github.com/github/super-linter)
+
+----
+
+### Assignments
+
+![Assignment](media/screenshot-os-assignment.png)
+
+----
+
+### Assignments
+
+![Assignments](media/screenshot-os-gitlab-submissions.png)
+
+----
+
+### Assignments
+
+![Assignments - Repository View](media/screenshot-os-repository-assignment.png)
+
+----
+
+### Assignments
+
+- Source code: solutions, generated skeletons, tests / checkers
+- Public and private repositories
+- [Super-Linter](https://github.com/github/super-linter)
+- Submission via [vmchecker-next](https://github.com/systems-cs-pub-ro/vmchecker-next)
+
+----
+
+### Compliance Checking Infrastructure
+
+![Compliance Checking Infrastructure](media/screenshot-os-linter.png)
+
+----
+
+### Compliance Checking Infrastructure
+
+- [GitHub Action workflows](https://docs.github.com/en/actions/using-workflows)
+- [Super-Linter](https://github.com/github/super-linter)
+- [Checkpatch](https://docs.kernel.org/dev-tools/checkpatch.html)
+
+----
+
+### Deployment Infrastructure
+
+![Deployment Infrastructure](media/screenshot-os-site.png)
+
+----
+
+### Deployment Infrastructure
+
+- Automated with GitHub action workflow
+- [Docusaurus](https://docusaurus.io/)
+- [open-edu-builder](https://github.com/open-education-hub/openedu-builder)
+- [oer-template](https://github.com/open-education-hub/oer-template)
+
+----
+
+### Submission Testing / Checking Infrastructure
+
+![Submission Testing / Checking Infrastructure](media/screenshot-os-gitlab-submissions.png)
+
+----
-### Homework
+### Submission Testing / Checking Infrastructure
+- [GitLab pipelines](https://docs.gitlab.com/ee/ci/pipelines/)
+- [Docker containers](https://www.docker.com/)
+- Moodle integration
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+
+
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+
+
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