Um, I'm not entirely sure why you think teachers only work 6 hours a day. I know a few high school teachers, and between lesson prep, grading, meeting with parents, etc. they work way, way more than 40 hours a week.
Teachers work 24 fewer minutes per weekday and 42 minutes per Saturday than other professionals. They worked a little bit more on Sundays, I'd guesstimate about 10 minutes based on the graph. (The weekday and saturday numbers are given in the text, the sunday number is not.)
Table 5 suggests this works out to about 7 hours and 15 minutes per weekday, and about 1 hour per saturday, maybe 1.5 hours per sunday. That's just shy of 39 hours/week, for 10 months/year.
Useful link, but I think your interpretation is slightly off.
I don't think that table is limited to full time teachers.
Table 10 seems to make it clear that it isn't.
The full time teachers that I know put in more than 40 hours a week. That being said, the pay is usually decent when compared with the cost of living. I certainly make more than many of my relatives who are teachers in central Illinois, but the costs of living tend to offset most of that. The teachers working locally are fairly well compensated for their jobs.
From everything I've seen, outside of the sciences, computers, and mathematics fields, teachers are paid well for their education. (I'm not sure how business fits in there. )
Paragraph 3 on Page 55 (which is describing Table 5) indicates that it refers to full time teachers. It's true that the caption doesn't make it completely clear, however.
Table 10 says full time teachers work about 5.5 hours/day (averaged over a week) which adds up to 38.5 hours/week. My estimate from Table 5 was 38.25 hours/week.
I have to call Bulls*t on that. Again, they have a prep period to do things in. That's 5 hours a week for grading, lesson prep etc... (and the reality is most teachers get their lesson plans off one of the hundreds of web sites that provide that service now days). As for meeting with parents, last I checked that doesn't happen too often. My parents never met any of my High School teachers.
It may very well be 7 or 8 hours a day. I'd concede that's possible. But over 40 hours a week? That (including the prep period) would be nearly 14 hours a week devoted to grading papers. I just don't think so.
Edit: Thinking a little more on this. Average Class Size in California is about 23 students per teacher (http://www.laalmanac.com/education/ed09.htm). Lets assume 2 assignments per week and just to make it fair lets assume they're typed essay based assignments (that the teacher has to read through and grade rather than multiple choice). A teacher has 5 periods so that's about 115 students or 230 assignments per week. The average words per typed page is about 600 and the average adult reads 250wpm (http://ezinearticles.com/?What-is-the-Average-Reading-Speed-...). Even under that heavy workload you're only looking at about 9 hours worth to grade it all and honestly that's with an unrealistic workload. No teacher assigns two full page typed essays every week.
But you're assuming the only thing teachers do is grade papers and teach. This isn't a spreadsheet calculation here.
Teachers also council students, tutor, do extra work such as activity clubs (debate club, for instance), coach sports, etc. Some of these, such as coaching, they may get paid an extra fee for, but it's not usually much. Most teachers (I know a few) feel lucky if they get to do these things, because it's usually working in a smaller group with the students that are excelling in the subject. In other words, the reason teachers want to teach in the first place..
Oh yea, and there's actually preparing to teach the class. When's the last time you gave a speech to 30 people with no outline? And then, you still have to grade the work.
And don't forget time to deal with parents too. Trust me, I've seen what they do, I'll take my 9-5 cubicle any day.
But how? Again, here's the facts I'm basing my opinion on:
1. I know, for a fact, that the School District in my area has a list of approved sites from which teachers can get lessons plans from. So they don't have to make those up from scratch.
2. Every teacher is guaranteed a prep period to take care of work
3. Grading shouldn't take all that much time. I could be missing something (and if so please tell me) but I ran the numbers above and they seem pretty accurate.
If public teachers really are as underpaid and over worked as they say I'd like to know about it. But they never offer any explanation and the numbers I can come up with (see above) paint a different picture.
Average reading speed means nothing: you have to add time to write comments in the margins and mark up the paper, you read more slowly when you're grading, often you're working with hard-to-read handwriting, and math problems (show your work!) take time to go through and debug, especially if you're giving partial credit (suppose I make a mistake at step 2 but the rest of my answer is logically consistent with that mistake...).
One one page typed essay assignment per week? I had 5 page papers, 20 page term projects, weekly quizzes in class, exams, 30 math problems once or twice a week, labs.
Of 30 math problems about five would be randomly selected and checked. 30 seconds on average to check a problem on your class size assumptions is about 5 hours a week (this is an average between about 10 seconds for someone who gets it right and 1-2 minutes for someone who makes some amount of mistakes and needs careful correction). Then you have quizzes and exams: let's amortize that to about 10 questions per week, and you need to carefully inspect them for partial credit. That's another 20 hours a week (let's say you take a full minute per problem). That's 25 hours a week to grade math.
