The document discusses characteristics and techniques for teaching slow learners and backward children in mathematics. It defines backward children as those unable to do work at the level of their peers and whose educational attainment is lower than their capabilities. Characteristics include lower mental than chronological age, inability to keep pace in class, and difficulties with abstraction, logic, and detecting errors. The document recommends techniques for teachers such as not overloading slow learners, using audiovisual aids, extra classes, deductive teaching methods, and breaking questions into simple parts.