adding link to slides

Author: lmilechin

_episodes/01-introduction.md

@@ -50,5 +50,6 @@ Work in small groups of 3-4. Have one person in your group create a repository f
 ## Additional Resources
 - [Code Refinery: Concepts around Collaboration](https://coderefinery.github.io/git-collaborative/concepts/)
 - [Code Refinery: Introduction to Version Control](https://coderefinery.github.io/git-intro/)
+- [Slide version of this lesson](https://github.com/INTERSECT-training/collaborative-git/blob/main/presentations/CollaborativeGit.pdf)
 
 {% include links.md %}

_episodes/02-branches.md

@@ -135,5 +135,6 @@ There should be one team member who still has an unmerged branch at the end of t
 - [Code Refinery: Branches](https://coderefinery.github.io/git-intro/branches/)
 - [Code Refinery: Conflict Resolution](https://coderefinery.github.io/git-intro/conflicts/)
 - [Atlassian Git Tutorials: Merging vs. Rebasing](https://www.atlassian.com/git/tutorials/merging-vs-rebasing)
+- [Slide version of this lesson](https://github.com/INTERSECT-training/collaborative-git/blob/main/presentations/CollaborativeGit.pdf)
 
 {% include links.md %}

_episodes/03-pr.md

@@ -72,4 +72,7 @@ In both this activity and the last one your branch was eventually merged into th
 
 If you have extra time, the remaining team members can create their own Pull Requests with new branches.
 
+## Additional Resources
+- [Slide version of this lesson](https://github.com/INTERSECT-training/collaborative-git/blob/main/presentations/CollaborativeGit.pdf)
+
 {% include links.md %}

_episodes/04-git-workflows.md

@@ -107,5 +107,6 @@ If time allows, discuss any projects that your group members work on collaborati
 - [Git Flow](https://nvie.com/posts/a-successful-git-branching-model/)
 - [Atlassian Git Tutorial: Comparing Workflows](https://www.atlassian.com/git/tutorials/comparing-workflows)
 - [Atlassian Git Tutorial: Git Forks and Upstreams: How-to and a cool tip](https://www.atlassian.com/git/tutorials/git-forks-and-upstreams)
+- [Slide version of this lesson](https://github.com/INTERSECT-training/collaborative-git/blob/main/presentations/CollaborativeGit.pdf)
 
 {% include links.md %}