Usually how long are the contracts?

Minimum 1 year

The standard contract will run until the end of the following August. Which means that if you are hired to start September 1st, it would be a 1 year contract.

If you are hired to start earlier/later, in the year, then it would be one year plus a number of months.

At the end of the contract, we generally offer new contracts to teachers that have worked well with the company, so long term employment is possible.