Our work day isn't over...

We spend many hours preparing for the students, before and after school, in the evening and on weekends. We want our students to succeed, so we put in the extra effort. When asked, the teachers have reported that we spend the following time working on behalf of our students per week:
1 – 5 hours ~ (15%)
6 – 10 hours ~ (36%)
11 – 15 hours ~ (21%)
16 – 20 hours ~ (11%)
21 – 25 hours ~ (13%)
26 – 30 hours ~(5%)
These percentages add up to 101% due to rounding up if the decimal was over 5

The hours add up...