I also received exactly the same eMail, same words and all, but the contact details are different, the Human Resources Manager is a different name, and the address is slightly different to yours.
Legally, or rather generally, a UAE employer/organisation recruiting an employee/s from abroad pays all the travel costs and arranges for travel documentation (VISA, Work Permits ...). Sometimes the amount is deducted from the prospective employee's first month's salary. Some organisations, in this case a school in UAE would pay the employee certain amount for Relocation and Travel Expenses in advance, once the contract has been signed and received by the employer.
In most countries, it is illegal to request a prospective employee to pay any amount for services until the employee has been placed.
The truth with this scam is that there is a genuine, real, existing school in Ras Al Khaimah called the IDEAL ENGLISH SCHOOL, Ras Al Khaimah / RAK - it is rated among the top 10 in Ras Al Khaimah and that someone is using the good name of the school to make an easy buck through deceiving job seekers and robbing them of they hard earned cash.
How can you have 3 different schools with the same name, in the same town, in the same street, in the same district but with different websites, different email addresses, different phone numbers, different post box numbers and different travel agents.
What i can say is that the scammers have copied the orginal website of the real Ideal English Sxchool, Ras Al Khaimah and just changed or added their contact details.
The best is to report this to the UAE Embassy in your country or the Department Education, the Department of Labour in UAE. It is also possible to get information on the registration numbers of the school. Also, you can report such scams to a local Interpol bracnh in your country or the country where the website was registered. The scammers can also be traced via the company that developed the website.
These people can be easily caught and brought to book. The sentence for such crimes are the same as for fraud and money laundering.