As a student I cannot remember any classroom that had an altar. It wasn't just there but it would have been good if we had it. A place where one could say a short pray or find refuge when in need.
But today, most classrooms in my school has an altar. The students offer water (choeb) and burn incense sticks in the morning and also butter lamps on auspicious days. In each class there is a student who initiates the offerings. And amazingly in all the cases it is always the boys who do this. But it could be also because the boys spend a lot of time in the classroom than the girls.
When you walk into a classroom in the morning you smell the incense burning and personally I feel that experience very prolific to the energy that accompanies me there.
Some more photos
The altars are made by the students themselves. They are made out of cardboards and painted elaborately. The kuthangs were also stitched by students. Of course they didn't do it in the school because the school doesn't have the necessary facilities or the tools. But something like this can be made abrasive if we can give them the support they need.
Students offer nendar (money) before they sit for their exams. The money is later used to buy incense sticks or oil for the lamps.
But I was also wondering, what about the christians or the hindus who are the minorities. Do they have an ambivalent attitude to these happenings? Or have they understood that "All religions are doors to the same House" - Steve Jobs.