Each profession has its own dissadvantages, but currently, being a teacher is really challenging.

Small typo on the word 'disadvantages'. Don't forget to add a space following a comma (,). 'Currently being a teacher' is wrong as you want to say that having a job as a teacher at this very moment is challenging, instead of you, personally, being a teacher right now.

We( teachers) face so many problems.,

You don't need brackets to specify that 'we' refers to teachers. You can say 'we teachers' to draw attention to you and your fellow teachers as a single body. I put a comma at the end as your sentence is not finished.

Eespecially if you are private school teachers as you have to be aware of your responsibilityies.

This should not be a new sentence as it is an addition to the last sentence.

Regardless of the issue, all the responsibility is on your shoulders.

You could use 'the responsibility always falls on your shoulders' to give your writing a bit of flair, as it is a phrasal verb.

No matter how good you are at teaching, or how much experience you have, if you cannot explain yourself clearly, and professionally, all your efforts can mean nothing.

You could use 'all your efforts amount to nothing' or 'all your efforts are in vain' to spice up your writing. Don't forget to use commas to separate new ideas in your writing. If you are in doubt, read the sentence out loud, and you will most likely need commas in places where you take breaks in speaking.

You can lose everything in ona single moment.

'A single moment' sounds a bit clearer as it highlights the gravity of the situation more, though 'one moment' is grammatically correct.

Each profession has its own dissadvantages, but currently being a teacher is really challenging.

We (teachers) face so many problems.

Especially if you are a private school teacher, you have to be aware of your responsibility.

Regardless of the issue, all the responsibility is on your shoulders.

No matter how good you are at teaching or how much experience you have, if you do not explain yourself clearly, and professionally, all your efforts can mean nothing.

Each profession has its own dissadvantages,but currently being a teacher is really challenging.

Especially if you are a private school teacher you have to be aware of your responsibility.

No matter how good you are at teaching or how much experience you have if you nocan't explain yourself clearly, and professionally, all your efforts can mean nothing.

Each profession has its own dissadvantages, but currently being a teacher is really challenging.

We (teachers) face so many problems.

Regardless of the issue, all the responsibility is on your shoulders.

No matter how good you are at teaching or how much experience you have if you nodon't explain yourself clearly, and professionally, all your efforts can mean nothing.