Place a tapping block against the plank, fitting it around the groove. Use a hammer or mallet to tap block and coax the tongue and groove to click together. Install the next plank by clicking its end into the previous plank, then tapping it against the previous course. Continue installing planks until you have filled the field.
Tip: To keep the floating floor from moving as you tap in the following courses, weight it down with the stacks of uninstalled planks.