Final answer:
The classic way of gauging sexual maturation in males and females is through the observation of physical changes during puberty.
Step-by-step explanation:
The classic and most efficient way of gauging sexual maturation in males and females is through the observation of physical changes during puberty. Puberty is the period during which humans become sexually mature and experience physical changes in their reproductive organs and secondary sexual characteristics. In females, the first menstrual period, called menarche, usually occurs around 12-13 years old, while in males, the first ejaculation, called spermarche, happens around 13-14 years old.