По първата тема:
http://www.teenproblem.net/school/index.php?m=s&id=916

По втората:
http://www.zapiski.info/view.php?id=271
http://www.teenproblem.net/school/s/1796.html
http://www.teenproblem.net/school/s/213.html

По третата:
http://www.zapiski.info/view.php?id=1327