* Provides a concise overview of differential equations focused on "modelling first" perspective. * Introduces concepts from statistics, data science, and other mathematics courses in an accessible way, encouraging further study in mathematics, statistics, and data science. * Includes models from biology, chemistry, physics, economics, and the social sciences. * Integrates R and the tidyverse throughout the text without assuming extensive previous subject knowledge of the two. * Includes a cohesive R package (demodelr) to supplement the material that is accessible for novice R users.