This is a three page packet which is perfect for teaching,and reviewing logarithms. It covers the definition of a logarithm and natural logarithm, change of base formula, and the characteristics of logs. This packet not only shows how to expand and collapse logs, but it why we can manipulate them the way we do. Logarithms are often a tough subject when first introduced, since they are intertwined with the characteristics of exponents. This packet thoroughly explains the mechanisms behind logs, to help students fully understand what they are doing when they work with logs.