Though it is possible in some cases, we are seeing daily in newspapers many students in the top rank of schools coming from poor families where their parents are doing household works/ rikshaw pulling/flower vendor etc., The intelligence in a student is automatically dwelt in him/herself and as used to tell by our Spiritual Guru, a teacher just brushing up the brain of students and not inserting anything. The major function in the students is attention without diversion. Distortion from family or circumstances should never come into the path of the students and for this parents should be very careful in handling children with more love and affection by not thinking pampering, as many parents are thinking if they show love and affection on them leads to pampering.
In those days my parents though not well educated they used to ask daily in evenings questions (not enquiring just with casual words) like what happened in the school /class today, Whether all teachers have come to the class etc., This makes the children to talk freely with the parents even if any problem faced in the school without hiding or fearing.
Parents or house elders should take them to the nearest libraries, museums and places where from they can enrich knowledge. I used to take our house children and even my relative children to Government Museum, Connemara Public Library in Chennai, Viswesvar iah Institute of Science, Bangalore where from the can gain outer knowledge.