In what grades must students typically undergo screening as mandated by regulations?

The correct choice indicates that students must typically undergo screening in kindergarten, second grade, and eighth grade, which aligns with health guidelines that prioritize specific developmental stages for vision assessment. The rationale behind these mandated grades is to identify vision issues early in a child's academic career, as these issues can significantly impact a child’s learning and overall development.

Screening in kindergarten allows for early detection before formal schooling progresses. Second grade screenings are often aimed at ensuring that any vision problems that could affect learning in the later grades are addressed. The inclusion of eighth grade screenings targets adolescents, a time when vision changes are common, and helps ensure that students are visually prepared for high school.

Other choices may include different grade combinations that do not consistently align with mandated screening practices targeting identified critical developmental phases.