Proportional Reasoning and the Visually Impaired

Proportional reasoning is an important aspect of formal thinking that is acquired during the developmental years that approximate the middle years of schooling. Students who fail to acquire sound proportional reasoning often experience diffi culties in subjects that require quantitative thinking, such as science, technology, engineering, and mathematics. These students may also have diffi culty with many real-life skills, such as cooking, reading a map, and scaling an object. As a result, teachers need to deliberately target proportional reasoning concepts regularly and over time to ensure that maximum opportunities for study are offered for their students. Lamon (1993) suggested that proportional reasoning might be the most commonly applied mathematics in the real world and thus extremely important in our daily lives