Most of these terms apply both to tandem and solo canoe paddling. For tandem canoes , both people should try to paddle on opposite sides of the canoe — this leads to better stability. Paddling on the same side makes a canoe tippy. Reach as far forward as you comfortably can. Plant the paddle blade fully in the water and pull the blade back towards you alongside the canoe. The canoe will move forward.
The J-Stroke is a version of the Forward Stroke that gets used by both solo and tandem stern paddlers because it's the most effective way to keep your boat going in a straight line while keeping your momentum. Using regular Forward Strokes you'll notice that your canoe turns a little to the off side with each one you take. The J-Stroke fixes this issue by adding a small pry at the end of power phase of the Forward Stroke.
Canoe paddle strokes are the means by which a paddle or paddles is used to move a canoe through the water. Strokes are generally designated as flatwater or whitewater strokes. The strokes are also combined or modified.