To counter their vulnerability, Miss Chen advocates sex-education programmes that convey not just the mechanics, but also the emotional and social aspects of sex.
More inspiration comes from the Netherlands, where the rate of teenage pregnancy has dropped since sex-education classes were changed to let youngsters discuss the subject more openly.
Private colleges are moving away from single-sex education as historically all-girls schools join forces with male counterparts or align themselves with bigger universities, according to Lisa Maatz, director of public policy and government relations for the American Association of University Women.
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The arguments against single-sex education come primarily from civil-rights and women's groups who oppose publicly-funded segregation on principle.
Nathan Schaefer, the executive director of the Pride Agenda, praised Ms. Quinn's work advocating for same-sex marriage and sex education, as well as her support for a transgender non-discrimination law.
In a survey of ex-pupils from girls' schools, the coalition says that a very high proportion believed that single-sex education had benefited them and given them greater confidence.
Public schools are generally larger and don't offer single-sex or religious education.
Rosenbaum is concerned that abstinence-only sex education programs that promote virginity pledges may also promote a negative view of condoms and birth control.
Mr Albert also stresses that the reasons why teenagers get pregnant and carry a baby to term are much more complicated than the content of sex education lessons - and notes that many young people take no notice of what they are taught at school.
K-12 education has seen a boost in single-sex schools since 2006, when the Bush administration relaxed regulations on how public schools could implement it.
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The real battles on same-sex marriage, abortion, education, spending, labor unions, and, yes, the Affordable Care Act are happening state by state.
In response, affirmative-action opponents developed an initiative to amend the Michigan Constitution to prohibit race- and sex-based discrimination or preferences in public education, employment and contracting.
This is the first of two report stage days, with amendments grouped into several subjects - (a) sex education, (b) conscientious or other objection to marriage of same sex couples, (c) equality law, (d) religious organisations' opt-in to marriage of same sex couples, and (e) protection against compulsion to solemnize marriages of same sex couples or to carry out activities in relation to the solemnization of such marriages.
Sex and relationship education is compulsory in state-funded secondary schools, but it is up to primary schools to decide if they want to teach it.
The Democrats want the federal government to impose policies regarding drugs, same-sex marriage, abortion on demand, sex education in the public schools, free birth control, etc. on the entire nation.
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Controlling for income, as well as age, sex, education, family situation and even political-party affiliation, Hispanics were 16 percentage points more likely than non-Hispanics to say the government should do more to raise the living standards of the poor.
In its 2011 School Climate report, the Gay Lesbian and Straight Education Network found that same-sex couples were frequently not allowed to attend school dances together or were penalized for doing so, such as being ineligible for "couple discounts" on tickets.
The rights of parents to be provided with an education for their children which conforms with their "religious and philosophical convictions" could lead to disputes in areas such as sex education, suggested Ms Driver, "re-awakening the debate on Section 28".
The discrepancy between both wanting to plan pregnancy and having unprotected sex may have something to do with a focus in recent years on abstinence-only education, said Laura Lindberg, senior research associate at the nonprofit Guttmacher Institute.
On Monday, Education Secretary Arne Duncan also spoke of his unequivocal support for same-sex marriage.
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The Education Secretary, David Blunkett, said on Sunday that he would be speaking to the Office for Standards in Education about evaluating the effectiveness of single sex teaching of some subjects in co-educational schools.
The Conservative education spokesman Lord James Douglas-Hamilton welcomed the move to allow same-sex couples to adopt jointly.
Groups such as the Family Research Council continue to advocate for abstinence-only education at the K-12 level, but the organization does not have an official stance on what sex education should happen beyond that, Sprigg said.
Education Secretary Michael Gove has offered his support to the proposed legalisation of same-sex marriage but told the Mail on Sunday teachers would not be disciplined for refusing to promote it.
Tory MP David Burrowes asked whether parents would be able to take their children out of RE, sex education and other classes in the curriculum where pupils were "taught about the value of same-sex marriage".
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