From Ayni's book 'Maktabi köhna' - 'The Old School'. What a pleasant book for children. (Actually it's quite interesting and entertaining...no, really, it is.)
Most books that I've read here are from the Soviet times, that's why the pages are yellow.
This is what Wikipedia says about Falaka: This type of beating is excruciatingly painful – the sole of the foot is one of the most sensitive parts of the human body. It was considered humiliating as well, and generally reserved for the lower classes, though a variant was also used in schoolrooms with unruly children.