This document discusses ability grouping and praise in education. It summarizes research showing that ability grouping children at a young age and streaming them into "top sets" can negatively impact lower-achieving students. Specifically, research found that 71% of September-born children were placed in top sets compared to only 26% of August-born children. The document also reviews research demonstrating that praising children's intelligence rather than effort can have a detrimental effect on their motivation and resilience. In contrast, praising hard work and the learning process leads to greater persistence and achievement. The document advocates avoiding ability labels and focusing feedback on effort, learning, and growth.