Ars Technica describes a study of how chimpanzees pass on tool skills to their young. The key pattern is a deliberate two-step sequence: adults first demonstrate the use of a tool, and then they hand the tool to the infants. The infants respond by imitating what they just saw.
This behavior suggests teaching is more active than simply allowing young chimps to observe from a distance. By transferring the implement directly, the adults give infants a chance to practice the skill in a guided context.
Because the report draws on a single source, there is no basis to compare independent findings. Still, the described observations align with a broader picture of social learning among chimpanzees, where imitation and scaffolding play a central role.