Senate passes bill defining human growth and development instruction as biology-focused

BOISE, Idaho — The Idaho Senate passed Senate Bill 10‑46 as amended on Feb. 27 to set requirements for classroom instruction described by its sponsor as focused on human growth and biological development.

Senator Nichols, sponsor of the bill, said the measure “is not a sex‑education bill. This is a biology bill,” and repeatedly framed the bill as requiring scientifically accurate instruction on fetal development and related biological processes. She told colleagues the bill is intended to “provide scientifically accurate instruction on biological process and development of the fetus from fertilization … to birth.”

The bill’s sponsor emphasized the measure narrows the scope of allowed supplemental materials to those “related to human growth and development,” saying schools could not add unrelated topics such as broader sex‑education content. The sponsor cited Idaho Code section 33‑1608 — the family life and sex‑education legislative policy — and said the bill places these human‑growth topics in the courses-of‑instruction portion of statute rather than in the family‑life policy section.

Opponents raised concerns about parental authority and opt‑out provisions and whether the bill might affect age‑appropriate instruction. A senator who opposed mandatory expansion of criminal penalties during unrelated debate noted the need to preserve local discretion; several senators referenced the curriculum selection committee that districts use to select materials.

The roll call showed 27 senators in favor and 8 opposed. The Senate recorded the bill as passed and approved the titles for transmittal to the House.

Background: Sponsor remarks noted letters of support from adoption agencies and that other states have similar classroom treatments. The bill’s text and the legislative record will provide final statutory language and specifics on opt‑out procedures.