I am never correct, except for in the present, in the now, in the current

I am never correct, except for in the present,
in the now, in the current.

I am hated by students, loved by teachers,
purposely created, and accidentally created.

I deserve a cross most of the time, but in special occasions the letter before 'w.'
I am the arch-enemy of the double zeros.

What am I ?

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I believe the answer is

I am never correct, except for in the present, in the now, in the current.

An incorrect answer is never correct except right now? But then that means that my answer is right...omg I love this riddle.

I am hated by students, loved by teachers, purposely created, and accidentally created.

Students don't like getting the wrong answer. I suppose teachers like it when students get the wrong answer? A nice teacher might like it because it gives a good lesson to the student. An evil teacher might like it because it drags down your grade...

I deserve a cross most of the time, but in special occasions the letter before 'w.'

When you get an answer wrong you get a cross? But sometimes you get a 'v'? Like a check mark?

I am the arch-enemy of the double zeros. What am I?

The double-zeros could mean 100 or full-marks. And an incorrect answer would definitely be the arch-enemy of a 100% on a test.

• until the "double zeros" part, I was sure the answer would be time. - which is only correct in the present, hated by students since they might be late or have deadlines, and teacher love punctuality - Nobody created time, but we purposely created the notion of time - The V part could be a reference to the victor time zone, which uses military time, but is 9 hours off. - this answer makes more sense though! Mar 9, 2018 at 7:34
• Reasonable answer. As for the 3rd part, I think this may do the trick. Mar 9, 2018 at 7:51

You are

Current/Present time

Explanation follows

I am never correct, except for in the present, in the now, in the current.

current time will be correct only when it's answered and that answer becomes wrong from the next moment.

I am hated by students, loved by teachers, purposely created, and accidentally created.

In elementary school, most of the time question asked by teachers in class and tests are find the time with the diagram of a clock.

I deserve a cross most of the time, but in special occasions the letter before 'w.'

Letter before w is V. And at 11:05 or 12:55, the clock hand resembles 'V'

I am the arch-enemy of the double zeros.

00 is considered as 12 in the case of time.

• I like this, +1, but not sure it fits perfectly as you go from "time" to "a clock face". Depends on the author's intent. Mar 10, 2018 at 14:22