In this eBook, we introduce matrices and discuss their basic properties. The concepts of matrix addition, subtraction, and multiplication are introduced in a clear, step-by-step manner. Many examples are given throughout to aid in the understanding and execution of new concepts, sometimes making use of color to illustrate more complicated ideas. Square, diagonal, identity, and zero matrices are also discussed and explained at length with several examples. The goal of this eBook is to teach students a practical way of thinking about what matrices are and how they work, in a way suitable for all students.