Because learners have different backgrounds and come to a learning experience through different circumstances, it is important to consider these factors when designing. Rather than try to understand the nearly infinite ways that a given set of learners will differ from one another, it is important to understand the most salient dimensions of learner difference when it comes to learner-centered design.
Learner personas are a useful tool for keeping track of these different dimensions and understanding how they will affect the main learner groups’ learning experience. As I created the different learner personas for Bookmarkd, I thought through how I could support learning across a wide variety of the design's target learners. These dimensions of difference included personal reading goals, likes, needs, and frustrations. For instance, I included three learner personas (pictured below): one would use my design to support their reading habit, another to expand their vocabulary, and the last to enhance their reading comprehension skills. In creating these personas, I developed empathy for my potential learners as I thought through the implications of their individual characteristics on my design.
Though "islands of expertise" was an explicit influence for two of my projects (Pollinator Protectors and Community-Based Math Teacher Resources), I continuously returned to it in each of my designs. Deep learning does not happen through a single, one-time engagement with an idea. Instead, we build expertise through a series of momentary interactions, some of which are more mundane and informal (Symmetry Dot Grid), and some are structured and formal (Artful Analytics).
In this way, learning is a "tapestry" that tells a story over time: learners weave different experiences and interactions together to create their "tapestries" of knowledge.