Question:
If there are other yeshivas and Bais Yakovs available in my city that charge lower tuition, can the difference that we have to pay be paid from our maaser funds?
Answer:
You can use masser money to pay the difference between tuition fees.
Sources:
Teshuvas Michas Yitschok 10:85, Igros Moshe Y:D 113, Emes Leya’akov Y:D 249, Teshuvas Vehanhogos 1:560-561, Orchos Rabenu 1:302.