First of all, LaserB2 is for Upper-Intermediate students, which means certain standards are expected. From my point of view, you need to reconsider some of the sentences which sound too strong and add some modality to the way you phrase your opinion. Here's what I mean:
As a result, children are more responsible -> ... children can become more responsible, can show more responsibility/ are likely to be more responsible, etc
The second problem I noticed is you 'Russian' punctuation. In English commas are used very differently to all (or at least, most) other European languages. So please be careful with your commas.
You didn't tell us the purpose of this essay writing so I can't really comment on something I'm not aware of. Anyway, the essay is really quite good. Or, one more thing. In modern English if you type your essays (or letters, email, etc) it is normal to hit enter twice between paragraphs
. If you're not quite sure what I mean, see how I've reformatted you essay.