THIS WEBSITE IS HORRIBLE, AND THE CREATOR LOOKS LIKE HITLER! THIS WEBSITE GIVES THE WORST EXPLANATIONS, AND SOMETIMES WHEN I TYPE IN THE CORRECT ANSWER IT SAYS ITS WRONG! AND I LOATHE THE KNOWLEDGE CHECKS BECAUSE THEY COULD RESET YOUR PROGRESS BY POSSIBLY TEN TOPICS! HONESTLY, I FEEL LIKE THE CREATOR OF THIS WEBSITE IS A RELATIVE OF HITLER HIMSELF! SO WHATEVER YOU DO, DON'T USE, THIS, GOD-DAMN WEBSITE