Blackboards in porn

I'm in internet heaven. The ever-fabulous Zwier sent me another gem, which I shall in turn pass on to you.
It's a website called:

The basic premise of the site is that a bunch of nerds pause on the frame in various pornos that use blackboards. Then they zoom in and grade what's been written on the board, for accuracy, levels of difficulty and how hard they've tried.

Here's an example from the site.

This is the scene right before the teacher accidentally drops her pencil on the ground under the hunk student's desk, and then when she gets down on her knees to pick it up she accidentally... wait, hold on a second, that's not what we're here for... back to the contents of the blackboard:

So according to the blog, the contents of the blackboard are:

Mathematics - year 8 level

This sets out to be a good illustration of the function more commonly expressed as y=x². (Why the teacher has chosen A and S is unclear; these are sometimes used in lower case form as acceleration and distance respectively, but the relationship between them would not then be physically correct.)

The graph has then been plotted, but sadly this is where the lesson begins to falter. Firstly, axes on the graph should be labelled with 'S' (horizontal) and 'A' (vertical). And the graph that has actually been plotted seems to be more like:
1. S=0 A=4
2. S=4 A=8
3. S=6 A=15

The graph is roughly the correct shape, but is not positioned correctly: it clearly intersects with the vertical axis at A=4. Even allowing for other drawing errors, this is a function more like A=bS²+4. It would also have been useful to extend the graph to S<0.

Finally, the teacher should make sure that her students keep their focus on their work. She only has three students, so can't complain too much about the pupil-teacher ratio. The teacher is giving all her attention to the lone male student, allowing the two female students to talk to each other, thus reinforcing gender stereotypes of women in maths, despite being female herself.

and they score it a:

5/10 Shows some promise

Here are some highlights from two others from the site. If you want to read the whole thing, visit here and check it out for yourself. It's worth the visit.
Here's the freeze frame, sorry to pause in the middle of the story, it was quite rivetting...

you see Bambi (with an 'i' not a 'y') just got an F, which means she'll never pass, and if she doesn't pass, she won't graduate, and then she can't go on to Harvard and become a forensic pathologist, and then she won't be able to save the world from an outbreak of toe and finger disease which will rip through the universe in 2019... oh no, how will she get Mr Dick Todgerson to increase her grade...) sorry I digressed, back to the blackboard:

According to the blog, the contents of the blackboard are History - A level standard or higher.

The nerds on the blog reckon:

Two blackboards shows that a lot of work has gone into this lesson.

And:

It's not a bad map by history teacher standards, though St Petersburg is too far south and Vladivostok too far north. But it certainly gives an idea of the key areas -

And they score it:

Overall: a very good effort - 7/10.

Some blackboard contents however aren't as advanced and don't score as well:

1 + 1 = 2

Oh well, I guess it's a good thing she's getting paid to give blowjobs, if that's the extent of her mathematical ability at that age 

And you thought there was no need to study hard and stay in school to become a porn star!