Four of the DD Clubbers from the picture listed as Monrovia school teachers in 1910.
archive.org - The Los Angeles Times 1910-06-25
Also in the picture, Mrs. Charles H. Anson (top row, 3rd from left) was tried and punished by the club for being a very naughty girl in 1905.
cdnc.ucr.edu - Los Angeles Herald, 29 October 1905