Old School Difference

This pictures of old schools maybe will stimulate you to find out something new, to learn more about architecture of old schools. Some of them are build long time ago, but still work with students. There are many interesting stories about these schools but you can investigate that in other occasion. Now, you just have to find five differences between two pictures. You also have to watch on time, because if it runs out the game will be over. Use your mouse to click on the differences, but if you click on a wrong place you get negative points. There are five pairs of pictures and you can get maximum 5000 points. So good luck!