Visual Bits
Very clear and well built typographic hierarchy, it reminds me of the Bauhaus typography which emphasizes the most on the clarity of the message. The colors are working together beautifully and all the elements are creating a communicative yet aesthetic composition that would inform the readers and please their eyes as well.
What caught my attention in this info graphic is the huge bolded "3". We can use this idea to separate each grades or classes. For elementary to middle school, we can emphasize the grade in big bolded black numbers(1~8) and the classes in a grey(50% capacity)(A~D) so that we can put text over it. For high school, we dont have "classes" so just the numbers.