Lying with statistics

I've talked about how to lie with statistics in some of my university courses. It was with amusement and horror that I saw this at my kids' school. The school scored 2.3 on 5th grade national math test, compared with 2.0 for other schools in the area. This is 17% higher, not 200% higher as the graphic suggests (the base line starts at 1.85 instead of 0). Really, isn't 17% enough?