The Ontario government has unveiled the first update to the province’s sex education curriculum since 1998.

Premier Kathleen Wynne has vowed that the updated curriculum will be in place in public and Catholic schools this September.

“We’re very committed to this,” Wynne told reporters on Monday.

The changes will impact students from Grade 1 to Grade 12.

Grade 1

Students in Grade 1 will be taught the proper names for body parts – something child-abuse investigators have long urged.

They will also learn how to recognize non-verbal signals, such as facial expressions and tone of voice, to better communicate with others.

Grade 2

In Grade 2, students will learn about bodily changes and development, verbal and physical violence, and the concept that “no means no.”

Grades 3-4

Grade 3 students will learn about same-sex relationships, while the physical, emotional and social impacts of puberty will move from Grade 5 to Grade 4.