In 1930 it was estimated that about 18,000 mothers and 6,000 students had attended lectures in Madrid since the start of the programs in 1918 and 1921 respectively.
En 1930 se calculaba, en Madrid, que unas 18.000 madres y alrededor de 6.000 escolares habían atendido las conferencias desde su inicio en 1918 y 1921, respectivamente.