Do you want to learn financial math? College and university students: Are you preparing for a midterm or final exam in engineering economics or finance? This "lightboard" video series will give you the essentials of most undergraduate engineering economics courses and introductory finance courses; basically any course that centers around the concept of the time value of money. Simple interest, compound interest, continuous interest, mortgages and bonds, tax and depreciation, rate of return (IRR), payback, net present value (NPV), inflation, and more. The videos mostly contain worked-example-problems (the best way to learn engineering economics and finance). The content is organized into playlists that should approximate the chapters of most course textbooks. The videos make use of a lightboard (also called a learning glass or glass board) to allow for hand-written solutions to problems. Enjoy!