In this report I have created an exploratory framework to identify opportunities to engage in literacy practices within mathematics curriculum materials. This framework describes "unstructured literacy opportunities" and "structured literacy opportunities" for each of the language modalities of reading, writing, speaking, and listening. Different structures within each modality are also detailed along with connections between the modalities. The framework is then applied to Illustrative Mathematics (IM) curriculum materials to reveal patterns of how different types of literacy opportunities are addressed and connected. [For the complete proceedings, see ED629884.]