Verb conjugation of "servir" in French

In order to improve the language skills we changed some features on Vocabulix. From now on users can not only drill isolated lesson but adhere to a specific lesson plan. That means that they can set goals and seek help from other users.
The fact that I have received many emails from students in order to make Vocabulix known is a personal success for me. But I think that a new website with many pages would be better for future uses.
Since when have you been learning Spanish? My children are not on Vocabulix, they are too small for it. We have no time for the normal day activities, and we are always on the move with the children.