WASHINGTON, D.C. – The Gay, Lesbian & Straight Education Network is highlighting a theme of LGBT acceptance in the National Education Association’s Read Across America initiative, including lessons on gender identity for kindergartners.

The teachers union’s Read Across America event is “an annual reading motivation and awareness program that calls for every child in every community to celebrate reading on the birthday of Dr. Seuss,” according to The GLSEN Companion to NEA’s Read Across America.

But it’s not the “The Cat in the Hat,” or “Green Eggs and Ham” that GLSEN is suggesting for its advocate educators. Instead, it offers six titles that promote LGBT lifestyles and are designed to teach students about bullying, bias, “family diversity,” and “gender roles/gender diversity,” according to the guide.

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“Each March, NEA’s Read Across America provides the perfect opportunity to include LGBT-relevant, developmentally appropriate literature in lessons,” the GLSEN website reads.

For instance, Justin Richardson and Peter Parnell’s “And Tango Makes Three” for kindergarten through second grade students revolves around the life of a gay penguin couple who take in an abandoned egg, and raise their new daughter in a loving household.

“This book is designed to help students realize that there are different family structures including families led by LGBT parents,” the guide reads. “This is the true story of Roy and Silo, two male penguins who share a nest like other penguin couples, and who are given an egg in need of nurturing.”

There’s also “Antonio’s Card” by Rigoberto Gonzalez about a boy named Antonio who must deal with his classmates who tease him about his lesbian mother’s lover Leslie.

The story, suggested by GLSEN for third through fifth grade students, “resonates with all children who have been faced with speaking up for themselves or for the people they love,” the GLSEN reading guide said.

Other suggested titles include “Oliver Button is a Sissy,” and “It’s Okay to Be Different.”

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A suggested “Oliver Button is a Sissy” book talk “is designed to help students identify gender expression-based bullying” by prompting them to “explore their own and others’ developing concepts about gender appearance and behaviors,” according to the guide.

For that lesson, aimed at students in kindergarten through second grade, the guide recommends the teacher ask students a series of questions about “gender roles and expectations” before reading the book out loud:

“When baby boys are born, what color do they often wear in the hospital or in the clothes they first wear?”

“What other colors are boys told to or expected to wear?”

“Are there other things besides colors that you think only boys are supposed to like or only girls are supposed to like?”

GLSEN believes that not nearly enough students are exposed to LGBT school content. The National Education Association’s Read Across America event is the perfect opportunity to change that by injecting LBGT issues into classrooms across the country, according to the organization’s website.

“GLSEN knows from research such as the National School Climate Survey (2014) that few students are exposed to curricular content that is inclusive of LGBT themes,” according to The GLSEN Companion to NEA’s Read Across America.

“And even though many schools endeavor to expand students’ knowledge of diversity few have the tools to expose them to LGBT role models, diverse families or even men and women outside of gender stereotypes.

“As such, NEA’s Read Across America provides a perfect opportunity to encourage schools to include of the kind of developmentally appropriate literature recommended in GLSEN’s Ready, Set, Respect! toolkit and add these to the bookshelves in school libraries as well as integrate them into the curriculum.”