Magnetic coaching board

A coaching aid for a team sport or activity, comprising

• a board formed of a flexible, rollable, single, integral sheet of a magnetic material adhered with a writeable and erasable vinyl sheet, the board being attachable to a magnetizable surface, the board depicting a half or full court or playing field;
• a plurality of participant pieces, each participant piece formed of a magnetic center disc and a bottom and top printed vinyl sheet and magnetically adhereable to the board;
• an erasable marker for writing upon the vinyl sheet of the board;
• a smaller diameter tube for storing the wet marker and the plurality of participant pieces, the board being adapted to roll around the smaller diameter tube;
• and
• a larger diameter tube for storing the smaller diameter tube and the board;
• wherein the team sport or activity includes one of basketball, baseball, lacrosse, soccer, field hockey, ice hockey, tennis, football, volleyball, softball, rugby, cricket or polo;
• wherein the magnetic field of each of the plurality of participant pieces is stronger than the magnetic field of the board and magnetic adherence of the participant pieces is principally through the magnetizable surface.