Refreshed and updated PowerPoint resources aimed at assisting teachers with the delivery of the CAIE (9609) A-level Business specification. These slides are designed to support the delivery of 9.1.2 Scale of Operations. The presentation starts with an examination of the factors that influence the scale of a business before it then considers the causes and examples of internal and external economies and diseconomies of scale.  It concludes with a look at the links between economies and diseconomies of scale and unit costs. The slides contain the Quick Fire Five questions and also a practice essay (both with solutions).