In terms of appearance I agree with dp. The sidebar is huge!! and I dislike those cloud things anyway, far too visually distracting. Whoever decided to introduce them was having a challenged moment. But because of that sidebar, it feels like the whole blog is listing towards the left. If, you can with your theme, you may want to consider a centred type of layout.
I never both with the most top rated posts thing though. I know others use it, but I've never clicked on it yet. It's so subjective.
Given that most people don't live in Ecuador you might want to consider some bigger pix and make photos more prominent.
And if you are aiming at a wider audience, rather than a narrow teaching one, keep the school posts to a min. I skipped over those, but loved (and commented on) posts like the gas bottle. ~It's the detail that often makes the difference and makes a post stand out.
In terms of style, you might want to find some blogs you like, and ask yourself why you like them, and compare your blog and theirs.