Which approach involves presenting information by starting with unknown concepts?

The approach that involves presenting information by starting with unknown concepts is the "unknown-to-known" method. This technique focuses on introducing learners to new or unfamiliar ideas first, which helps to build interest and engagement. By beginning with what the students do not already know, the instructor stimulates curiosity and prompts inquiry, ultimately guiding the students toward understanding and mastering the concepts.

The "unknown-to-known" approach is particularly effective in settings where students might lack foundational knowledge. It allows the instructor to scaffold learning by gradually providing the necessary context and explanations that lead to comprehension of more complex ideas. As the students begin to grasp these new concepts, they can better connect them to what they already know, facilitating deeper learning.

In contrast, other methods such as transitioning from known to unknown or moving from basic to complex, typically start with familiar concepts before introducing new material. These approaches can be beneficial in certain educational contexts, but they do not prioritize engaging with unknown ideas right from the outset like the "unknown-to-known" strategy does.