The subject of  herhisitsourtheir speech is the need of abolishing
homework. Giving homework is a very old practice. But
 herhisitsourtheir disadvantages outnumber  herhisitsourtheir advantages.
It does help children to revise  herhisitsourtheir lessons. But it
leaves them no time to attend to  herhisitsourtheir hobbies. My
neighbour Sumi reads in a progressive school. In  herhisitsourtheir
school, they have abolished homework. But in  herhisitsourtheir
brother Sushant's school, the practice still continues.
 herhisitsourtheir teachers probably compete with one another to
burden the children with homework. As a result, when
Sumi is watching  herhisitsourtheir favourite television programme
or tending  herhisitsourtheir plants, Sushant is pouring over  herhisitsourtheir books.