Students at one northern California high school are learning more than just the birds and the bees.

Along with local area groups, some parents are irate that their children’s sex ed class at Acalanes High School in Lafayette is being taught by employees of Planned Parenthood without their prior knowledge. They are also fuming over the methods and materials being used, including a checklist that asks students if they are “ready for sex” and another worksheet that describes how to give and obtain consent, as well as a diagram that uses a “genderbread” person for lessons in gender identity.

“[Parents] are very concerned,” Brad Dacus, president of the Pacific Justice Institute, a non-profit legal organization that is assisting the concerned parents, told FoxNews.com. “Planned Parenthood is not exactly the best when it comes to putting young people first.

“They get more grants from the promiscuity of children,” he added. “The material they have provided was material that mirrored their agenda.”

It was the parents of ninth-graders at Acalanes that started raising questions after their children told them one instructor threw a model of female reproductive organs at one student and that many felt the sessions were pressuring them to have sex.

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