Guide to orthodox bar mitzvah

Orthodox Bar Mitzvah Custom
In many communities it is a custom to call up the bar Mitzvah to read from the Torah, or to say the Blessings over the Reading of the Torah, but this is also not necessary in order to "become bar Mitzvahed." Being a bar Mitzvah means being at the age where you are required to do the Mitzvos, the Commandments of the Torah

When Jewish girls and boys reach puberty, both assume full religious responsibilities. Yet traditional Judaism defines these obligations differently for men and women.

ORTHODOXY AND BAR / BAT MITZVAH
The majority of Orthodox Jews reject the idea that a woman can publicly read from the Torah or lead prayer services. However, the public celebration of a girl becoming Bat Mitzvah in other ways has made strong inroads in Modern Orthodox Judaism and in some elements of Haredi Judaism.

A boy retains his religious maturity and becomes responsible to fulfill all Torah commandments at the age of 13. A girl becomes equally responsible one full year earlier, at the age of 12, corresponding to her earlier maturation.
When do Jewish boys acquire their tallit at the Bar Mitzvah? is a question many would ask.

NY DJ Jerry Laskin creates the party for a NYC Modern Orthodox Bar Mitzvah.
"The Bar Mitzvah celebration at the Jewish congregation was nothing like the Orthodox Bar Mitzvah."

Jewish Celebrations site will take you around an Orthodox synagogue. Orthodox Jews believe that no changes should be made to the laws in the Torah, whereas Reformed Jews believe that the laws can be re-interpreted for the modern day. There are a number of differences between Orthodox and Reformed Judaism.