We believe this is Hebrew School class photo (confirmation class?) and we cannot identify the others in the photo.
Leah was born 12 September 1917 in New York City and Mildred (aka Minnie) 12 June 1917. About 1930 (approximately when this photo would have been taken), Leah and Minnie's families lived next door to each other at 1950 and 1948 E. 12th Street, Brooklyn, New York. 
The family attended the Avenue U Educational Center located at 2066 E. Ninth Street, Brooklyn. The Orthodox synagogue's Rabbi Charles Kahane was a well known scholar and a leader in the Revisionist Zionist movement. He was installed as Rabbi of the synagogue in 1928. 
His career, however, was eclipsed by his son, Martin, who later became known as Meir Kahane (1932-1990): Rabbi, radical and firebrand.
1. 1930 U.S. Census, Kings County, New York, population schedule, Enumeration District 24-1303, Assembly District 2, sheet 1B, Family number 21, Jack Garber; digital image, Ancestry.com (http://www.ancestry.com : accessed 4 march 2008), citing Family History Library Microfilm 2,341,232.
2. "Installed as Rabbi," Brooklyn Daily Eagle (Brooklyn, New York), 21 May 1928, page 20, column 7; digital image, Old Fulton New York Post Cards (http://fultonhistory.com/Fulton.html : accessed 18 March 2010).