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The pass rates are probably higher than you believe although the test has a bit of a standing that is daunting. And, like with any examination, with proper training and a Grangegorman instructor you've got a great likelihood of passing.
EDT is a training course of Twelve one-hour lessons. These lessons are designed to cover certain crucial driving skills and improve your practical driving abilities.
You also need to have a Sponsor, a seasoned driver (many learner drivers pick a relative) who will oversee your driving practice inbetween driving lessons in Grangegorman, and will also track your progress in your logbook.
After you complete your EDT course, you may need added support lessons in Grangegorman with an Approved driving instructor to enhance your driving skills.
On the appointed test date, you must bring your fulfilled logbook on the day of your driving test, as you may have to show the examiner it.