Abstract: A lesson planner includes a foldable notebook containing a series of transparent lesson plan retaining sheets for supporting lesson planning cards used by an instructor to prepare and present a lesson plan for a class. Each lesson plan retaining sheet includes a first panel removably secured to the binder of the notebook and a second panel hingedly coupled to the first panel. The hinged coupling allows the second panel to be folded against the first panel when not in use, and to be extended outwardly away from the first panel when in use. A releasable fastener temporarily maintains the second panel proximate the first panel when the lesson plan retaining sheet is not in use. The first and second panels of each lesson plan retaining sheet including pockets for temporarily storing and displaying one of the lesson planning cards. Labels adjacent such pockets indicate the time of day each lesson is to be taught; likewise, each lesson plan retaining sheet includes a label indicating the day of the week.