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Free Courses [Entropy and Equilibria](https://pll.harvard.edu/course/entropy-and-equilibria) Expand your learning of chemistry and thermodynamics by exploring entropy, free energy, and equilibrium. [Cell Biology: Mitochondria](https://pll.harvard.edu/course/cell-biology-mitochondria) A human-centered approach to the fundamentals of cell biology with a focus on the power plants of the cell - mitochondria. [MLOps for Scaling TinyML](https://pll.harvard.edu/course/mlops-scaling-tinyml) This course introduces learners to Machine Learning Operations (MLOps) through the lens of TinyML (Tiny Machine Learning). Learners explore best practices to deploy, monitor, and maintain (tiny) Machine Learning models in production at scale. [Innovating in Health Care](https://pll.harvard.edu/course/innovating-health-care) Find innovation opportunities in health care technology, management, consulting, or investing by examining health care cost, quality, and access. [Calculus Applied\!](https://pll.harvard.edu/course/calculus-applied) Apply tools of single-variable calculus to create and analyze mathematical models used by real practitioners in social, life, and physical sciences. [Christianity Through Its Scriptures](https://pll.harvard.edu/course/christianity-through-its-scriptures) Learn about Christianity through a study of its sacred scriptures. We will explore how diverse Christians have interpreted these writings and practiced their teachings over a 2000 year, global history. [Ancient Masterpieces of World Literature](https://pll.harvard.edu/course/ancient-masterpieces-world-literature) Examine how cultures of the ancient world defined themselves through literature and how their vision of literature contributes to our understanding of civilization, culture, and literature today. [Data Analysis: Basic Probability and Statistics](https://pll.harvard.edu/course/data-analysis-basic-probability-and-statistics) Increase your quantitative reasoning skills through a deeper understanding of probability and statistics, with the engaging “Fat Chance” approach that’s made this course a favorite among learners worldwide. [The Architectural Imagination](https://pll.harvard.edu/course/architectural-imagination) Learn fundamental principles of architecture — as an academic subject or a professional career — by studying some of history’s most important buildings. [Sikhism Through Its Scriptures](https://pll.harvard.edu/course/sikhism-through-its-scriptures-0) This course examines the Sikh scripture from a doctrinal and historical perspective by providing an overview of Sikh teachings as well as the historical context within which the scripture evolved and became canonized.