First-graders in New Jersey will be learning about gender identity with new sex education curriculum which includes a lesson that teaches children they can have 'boy parts' but 'feel like' a girl. 

The new lessons, which are part of a broader, K-12 health and sex education curriculum adopted by the New Jersey Board of Education, are alarming some parents, Asbury Park Press first reported. 

One of the 30-minute lesson plans, called 'Pink, Blue and Purple,' teaches the students to define 'gender, gender identity and gender role stereotypes.'

Another lesson plan, this one for second-graders called 'Understanding Our Bodies,' tells teachers to instruct students that 'being a boy or a girl doesn't have to mean you have those parts, there are some body parts that mostly just girls have and some parts that mostly just boys have.' 

'Most people have a vulva and a vagina or a penis and testicles, but some people's bodies can be different,' the plan states. 'Your body is exactly what is right for you.' 

The new state sex education guidelines, which go into effect in September, were handed out to parents at the Westfield Board of Education meeting in February, and included instructions for teachers to tell students that their gender identity is up to them.   

'You might feel like you're a boy even if you have body parts that some people might tell you are ''girl'' parts,' the lesson plan states.

'You might feel like you're a girl even if you have body parts that some people might tell you are ''boy'' parts. And you might not feel like you're a boy or a girl, but you're a little bit of both. No matter how you feel, you're perfectly normal!'