Not sure about the difference between genderqueer, gender non-conforming and transgender? Here are some definitions from GLAAD to help in your work with transgender youth.
A term used by some to describe people who are not transgender. "Cis-" is a Latin prefix meaning "on the same side as," and is therefore an antonym of "trans-." A more widely understood way to describe people who are not transgender is simply to say non-transgender people.
A term used by some people who experience their gender identity and/or gender expression as falling outside the categories of man and woman. They may define their gender as falling somewhere in between man and woman, or they may define it as wholly different from these terms. The term is not a synonym for transgender or transsexual and should only be used if someone self-identifies as genderqueer.
In 2013, the American Psychiatric Association released the fifth edition of the Diagnostic and Statistical Manual of Mental Disorders (DSM-V) which replaced the outdated entry "Gender Identity Disorder" with Gender Dysphoria, and changed the criteria for diagnosis. The necessity of a psychiatric diagnosis remains controversial, as both psychiatric and medical authorities recommend individualized medical treatment through hormones and/or surgeries to treat gender dysphoria. Some transgender advocates believe the inclusion of Gender Dysphoria in the DSM is necessary in order to advocate for health insurance that covers the medically necessary treatment recommended for transgender people.
External manifestations of gender, expressed through one's name, pronouns, clothing, haircut, behavior, voice, or body characteristics. Society identifies these cues as masculine and feminine, although what is considered masculine and feminine changes over time and varies by culture. Typically, transgender people seek to make their gender expression align with their gender identity, rather than the sex they were assigned at birth.
One's internal, deeply held sense of one's gender. For transgender people, their own internal gender identity does not match the sex they were assigned at birth. Most people have a gender identity of man or woman (or boy or girl). For some people, their gender identity does not fit neatly into one of those two choices. Unlike gender expression (see below) gender identity is not visible to others.
A term used to describe some people whose gender expression is different from conventional expectations of masculinity and femininity. Please note that not all gender non-conforming people identify as transgender; nor are all transgender people gender non-conforming. Many people have gender expressions that are not entirely conventional -- that fact alone does not make them transgender. Many transgender men and women have gender expressions that are conventionally masculine or feminine. Simply being transgender does not make someone gender non-conforming. The term is not a synonym for transgender or transsexual and should only be used if someone self-identifies as gender non-conforming.
An older term that originated in the medical and psychological communities. Still preferred by some people who have permanently changed - or seek to change - their bodies through medical interventions (including but not limited to hormones and/or surgeries). Unlike transgender,transsexual is not an umbrella term. Many transgender people do not identify as transsexual and prefer the word transgender. It is best to ask which term an individual prefers. If preferred, use as an adjective: transsexual woman or transsexual man.
An umbrella term for people whose gender identity and/or gender expression differs from what is typically associated with the sex they were assigned at birth. People under the transgender umbrella may describe themselves using one or more of a wide variety of terms – including transgender. Some of those terms are defined below. Use the descriptive term preferred by the individual. Many transgender people are prescribed hormones by their doctors to change their bodies. Some undergo surgery as well. But not all transgender people can or will take those steps, and a transgender identity is not dependent upon medical procedures.
People who were assigned female at birth but identify and live as a man may use this term to describe themselves. They may shorten it to trans man. (Note: trans man, not "transman.") Some may also use FTM, an abbreviation for female-to-male. Some may prefer to simply be called men, without any modifier. It is best to ask which term an individual prefers.
People who were assigned male at birth but identify and live as a woman may use this term to describe themselves. They may shorten to trans woman. (Note: trans woman, not "transwoman.") Some may also use MTF, an abbreviation for male-to-female. Some may prefer to simply be called women, without any modifier. It is best to ask which term an individual prefers.