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This Basic Counting Rules: Sandwich Shop interactive also includes:
- The Fundamental Counting Principle
- Student Reference
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Young mathematicians make a tree diagram of all possibilities for sandwiches using an interactive. They learn how multiplication speeds up the process of finding the number of outcomes.
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Instructional Ideas
- Use the resource as an intervention tool for struggling learners
Classroom Considerations
- Requires users to set up a free CK-12 account
- Note that pupils may be unfamiliar with the type of tree diagrams in the resource
Pros
- Some challenge questions have hints
- Provides a tutorial that explains the concept
Cons
- None