These are the 5 rules I follow to teach new rowers correct rowing on a total of 40 sessions of 100 minutes. From there they can row well.
Develop part of the coordination on the land with a Dynamic erg with computer software feedback. I use the Rowperfect3. Never row on a stationary erg, it is very detrimental for the process.
Take the rowing on the water as boat skill development and teach grip, blade work, balance and coordination. Don’t try to develop fitness on the water. Row sculling boats: 1x, 2x and 4x.
Have the novice rowers row sometimes with experience rowers to feel the right rowing and understand what they need to do.
Row on the land and on the water really slow to be able to make perfect strokes and make changes. To be aware of what we are doing it needs to be done really slow. 14 to 16 strokes a minute or less with some pauses during the recovery.
Row on boats that are light and rigged properly so they can feel the water and their movements.