What is the term for a young person training under a skilled tradesperson?

The term for a young person training under a skilled tradesperson is "apprentice." An apprentice engages in a structured program that combines on-the-job training with classroom instruction, allowing them to gain practical experience while learning the theory and skills necessary for their trade. This training model is designed to develop proficiency in a specific skill or trade, such as carpentry, plumbing, or electrical work, under the guidance of a qualified mentor.

While terms like intern, worker, and assistant may refer to individuals working in various capacities, they do not carry the same connotations of formalized training in a trade. Interns typically undergo short-term work experiences that may not always be trade-specific, workers can be anyone engaged in work regardless of their level of training or skill, and assistants usually provide support to professionals rather than focusing on skill development in a specific trade. Thus, "apprentice" is the most accurate term for this training scenario.