Final answer:
Product-based differentiation is the instructional strategy that allows students to demonstrate learning through culminating activities by creating original products such as presentations or projects.
Step-by-step explanation:
The way that teachers differentiate instruction to allow students to demonstrate their learning through culminating activities is Product-based differentiation. This method acknowledges that each student may have a unique way of showcasing their understanding of the material, and as such, product-based differentiation provides a variety of end products for students to choose from. These culminating products can include presentations, reports, art projects, or other forms of expression that require the application of what they have learned to create something original. These products are typically evaluated based on demonstration of skills and knowledge rather than a traditional test format, thus supporting student-centered learning.