Tally marks are a simple way to count and keep track of numbers using a series of lines. Each line represents one unit, and when counting reaches five, the fifth line is drawn diagonally across the previous four lines. This method makes it easy to quickly see how many items have been counted without needing to write down numbers. Tally marks are often used in classrooms, surveys, and games to record scores or quantities. They provide a visual representation of data, making it easier to understand and analyze. This counting system is especially useful in situations where quick tallies are needed, such as during classroom activities or field observations.