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Collaboration Full Guide
Remixing, Contributions & Remix Trees

Learn the difference between adding a contribution and creating a remix, when each option makes sense, and how remix trees help teachers understand connected lesson versions.

4 min read 6 sections Updated for the current lesson library
1
Understand the difference

When you find a lesson you want to build on, CARL gives you two collaboration options. The key question is whether you want to add something to the original lesson or create your own editable version.

Annotated remix and contribution overview showing Create Remix and Add Contribution options
Click to enlarge

Use Create Remix when you want your own editable version. Use Add Contribution when you want to add another resource or component to the lesson.

OptionWhat it doesUse it when...
Add ContributionAdds an extra component or resource to a lesson without changing the original lesson plan.You want to share a helpful add-on, such as an exit ticket, worksheet, activity, or support resource.
Create RemixCreates your own editable version of the lesson.You want to adapt the actual lesson plan, revise the structure, change the grade level, or customize it for your class.
Remix TreeShows how a lesson connects to its original and other remixed versions.You want to understand where a lesson came from or how other teachers have adapted it.
Quick ruleUse Add Contribution when you are adding something extra. Use Create Remix when you are changing the actual lesson.
2
Add a contribution

A contribution lets you add a useful component or resource to a lesson without rewriting the lesson itself. Contributions appear separately so other teachers can browse the added materials.

When to add a contribution
  • You want to add a worksheet, exit ticket, activity, support resource, or optional extension.
  • You are not trying to change the lesson sequence, timing, instructions, or core plan.
  • You want other teachers viewing the lesson to see your added material as an option.
StepWhat to do
1Open the lesson you want to contribute to.
2Click Remix in the lesson actions area.
3Choose Add Contribution.
4Browse or filter for the component or resource you want to add.
5Preview the material to make sure it fits the lesson.
6Publish the contribution.
Contribution visibilityA contribution does not rewrite the original lesson. It adds another option for teachers who are viewing that lesson.
Good to knowIf you need to create the material first, start with Adding Components or Adding Teaching Resources, then return to the lesson and add it as a contribution.
3
Create a remix

A remix creates your own editable version of a lesson. Use this when you want to adapt the lesson plan itself for your class, rather than adding a separate material to the original.

Use Create Remix when you want to
  • change the lesson structure, sequence, or timing,
  • adapt the lesson for a different class, grade, or context,
  • revise activities, instructions, examples, or supports,
  • make your own version without changing the original,
  • continue editing when the original lesson is protected.
Editing a remix draft in CARL
Click to enlarge

Your remix opens as an editable draft that you can adapt for your class.

Basic workflow
  1. Find a lesson in the library or open a lesson details page.
  2. Click Remix.
  3. Choose Create Remix.
  4. Edit your new draft version.
  5. Review the changes and save your work.
  6. Publish your remix when it is ready to share.
Good to knowYour remix starts as your own editable draft. Publish it only when you are ready for others to view, save, or remix your version.
4
Understand remix trees and protected lessons

A remix tree shows how lesson versions are connected. It helps teachers see the original lesson, remixed versions, and how ideas have branched over time.

TermWhat it means
Original lessonThe lesson that another teacher started from.
RemixA separate editable version based on another lesson.
Remix treeA visual or structured way to show related lesson versions.
Protected lessonA lesson that cannot be directly changed because another teacher has saved or used it. In that case, create a remix instead.
Why this mattersCARL protects shared lessons so one teacher’s edits do not unexpectedly change the version another teacher saved. If editing is blocked, create a remix and continue from your own version.
5
Coming soon: more collaboration tools

CARL’s collaboration tools will continue to grow. These features are not the core remix workflow yet, but they help show where collaboration is heading.

Quick Notes

Quick Notes are planned as small teacher tips attached to specific parts of a lesson. For example, a teacher could share that a section needed five extra minutes, worked better with manipulatives, or needed a simpler prompt.

Co-constructive proposals

Co-constructive proposals are planned as more substantial suggestions for improving someone else’s lesson. Unlike a remix, a proposal would ask the original author to review and decide whether to incorporate the change.

Current focusThe main collaboration actions to understand now are Add Contribution and Create Remix. Coming-soon features should be treated as roadmap context.
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Quick Reference
If you want to...Use
Add an extra component or resource to a lessonAdd Contribution
Share an optional add-on with other teachersAdd Contribution
Adapt the lesson plan for your own classCreate Remix
Change the structure, timing, instructions, or activitiesCreate Remix
Keep the original lesson unchangedCreate Remix or Add Contribution, depending on the task.
Understand how versions are connectedRemix Tree
Edit when the original is protectedCreate Remix