This is the most common template for streaking. It divides the circular dish into four equal pie-slice segments via a vertical and horizontal line. Students use this to practice the four-quadrant streak method for isolating single colonies.
When placing antibiotic disks on a plate, a grid ensures equidistant spacing. Technicians place disks at specific grid intersections to prevent overlapping inhibition zones.
: For quick experiments, use a permanent marker to draw a grid on the bottom of a clear container or plate.