The twelve mandatory lessons
Essential Driver Training, taken in order
EDT (Essential Driver Training, the twelve mandatory lessons) is not a formality to be rushed. It is the reason a learner today finishes knowing more of the job than a whole generation who picked it up from a relative in a quiet car park.
If your first learner permit issued any time in the last decade or so, you must complete twelve EDT lessons with an approved instructor before you can sit the driving test. The Road Safety Authority (RSA) brought it in for one plain reason: too many new drivers were being taught the wrong things by well-meaning people who had been drifting into bad habits since the year they passed. EDT sets a steady floor under everyone. This is how the floor works.

What the twelve cover
The lessons run in a set order, from basic car control up to higher speeds and night driving. Each has a syllabus, and after each one your instructor records how you did in your logbook. It builds, gently. You do not meet roundabouts on lesson one, because your hands are not ready for roundabouts on lesson one. The full breakdown is in the guide on the twelve EDT lessons, but the short version is this: control first, then junctions and roundabouts in the middle, then anticipation, higher speeds and the dark.
The logbook, and why I will not fudge it
Your EDT logbook is a record the RSA can ask to see. Every lesson signed means you covered that ground to the standard. I do not sign a lesson you have not earned, and I will tell you calmly why if I am holding one back. It feels slower. It is not. A logbook waved through early only means you meet the tester underprepared, fail, pay again and wait again. Slow, in the passenger seat, is nearly always the fast way round.
Between lessons you are meant to practise with a sponsor, the name for the patient soul in the passenger seat with the L-plates and the nerves of their own. Log those hours. The lessons teach the thing right, and the practice is what makes it yours.
EDT is the start, not the finish
Twelve lessons is a minimum, not a magic number. Some people are test-ready at twelve and some need more, and pretending otherwise is how instructors quietly set learners up to fail. When the twelve are done, and done well, the next step is the driving test. If you would like a sense of how I run the lessons before you commit, that is what the services page and the contact page are for.