This companion work provides an introduction to Multisim and supports its use in a beginning linear circuits course based on the textbook, Electric Circuits, Eighth Edition by James W. Nilssson and Susan A. Riedel.  The ease of use interface and design features of Multisim make interactive validation of circuit behavior uncomplicated and insightful. Topics appear in this supplement in the same order in which they are presented in the text. Step by step instructions, screen captures and 22 illustrative examples provide an easy path for mastering circuit simulation with Multisim. To assess understanding a list of recommended exercises from each chapter of the main text are provided at the conclusion of each chapter.