Sources:

http://cartoongraphics.blogspot.com/2011/03/south-park-eric-cartman-wallpaper.html

https://www.google.com/url?sa=i&rct=j&q=&esrc=s&source=images&cd=&cad=rja&uact=8&ved=0ahUKEwi9y964teTXAhXMUd8KHahpBO8QjRwIBw&url=https%3A%2F%2Fwww.extron.com%2Fcompany%2Farticle.aspx%3Fid%3Djurupapolevault&psig=AOvVaw29wCxwNyo8w36EBjEmNFDO&ust=1512066664192196

http://www.concordmonitor.com/getattachment/b6d59c86-dc14-4868-8fd6-41d597bf35fc/MiddleSchool-YourLife-cm-081416-ph01https://www.google.com/url?sa=i&rct=j&q=&esrc=s&source=images&cd=&cad=rja&uact=8&ved=0ahUKEwjjxc6DtenXAhUC2SYKHSviCCQQjRwIBw&url=https%3A%2F%2Fcspinet.org%2Fresource%2Fvending-contradictions&psig=AOvVaw1M0ek_-lWVKM_hm9eIEJnC&ust=1512238356896663

http://br.skschools.net/UserFiles/Servers/Server_59790/Image/Library/P8120003.jpg

https://www.google.com/url?sa=i&rct=j&q=&esrc=s&source=images&cd=&cad=rja&uact=8&ved=0ahUKEwjEhKHW8e7XAhVq4YMKHcvmDI0QjRwIBw&url=https%3A%2F%2Fnorthfieldnomo.wordpress.com%2F2009%2F08%2F10%2Fattack-of-the-medians%2Fwoodley-5%2F&psig=AOvVaw3F_R5b4GWsu37UEgnBsCEp&ust=1512426421275131