The effective teaching of counting skills requires teachers to understand the fundamental concepts related to the development of basic math skills—what they are and how they develop. Teachers of Children with Visual Impairments (TVIs) need to use evidence-based strategies to teach counting skills to help their students understand number and quantity. This article explains the principles of the development of counting skills and typical difficulties children with visual impairments may experience. It provides several strategies that teachers can use to support children with visual impairments in developing counting skills. A case study illustrating the application of these evidence-based teaching strategies is presented.