An Elementary School Classroom in a slum

Hi guys...I have my english exam day after. And I missed the explanation of the poem. Can you please help me in understanding it?

Its Urgent.

Thanks in advance.


Here's the poem:-

Far far from gusty waves these children's faces.
Like rootless weeds, the hair torn around their pallor.
The tall girl with her weighed-down head. The paper-
seeming boy, with rat's eyes. The stunted, unlucky heir
Of twisted bones, reciting a father's gnarled disease,
His lesson from his desk. At back of the dim class
One unnoted, sweet and young. His eyes live in a dream,
Of squirrel's game, in the tree room, other than this.

....

Run naked into books, the white and green leaves open
History is theirs whose language is the sun.

This is an old post but I found the poem, by doing a search of the first two lines. It is by Stephen Spender:
https://inspiredexpressions.wordpres...y-makes-sense/. It is a post in a word press blog: https://inspiredexpressions.wordpress.com, which is still active. Most recent post on 7 Nov 2015. An interesting blog...

The post was interspersed with the author's comments and had some 27 replies, so it was appreciated.