Calculating Elapsed Seconds on an Analog Clock

MatholiaChannel

This educational video provides a step-by-step demonstration on how to calculate elapsed time in seconds using an analog clock. Through four distinct examples, viewers are shown two side-by-side clock faces representing a start time and an end time. The narrator guides students through the process of tracking the movement of the second hand (the thin red hand) to determine the duration of the interval. The video utilizes visual aids, such as purple loops connecting the numbers on the clock face, to reinforce the concept of skip-counting by fives. The key themes explored include reading an analog clock, understanding the value of the numbers on a clock face in terms of seconds, and using skip-counting as a primary strategy for calculation. The video progressively increases the difficulty of the problems. It starts with short intervals that are easily counted, moves to longer intervals crossing the bottom of the clock, and concludes with a "full circle" problem that introduces a subtraction strategy (subtracting the remaining gap from 60) as a more efficient method than counting all the way around. For educators, this video is an excellent tool for visual learners transitioning from simply reading time to calculating time intervals. It effectively models mathematical thinking by vocalizing the counting process ("5, 10, 15...") and visually mapping the passage of time. The final example is particularly valuable for teaching flexible thinking, showing students that they can use subtraction to solve problems that would be tedious to solve via addition. This resource supports standards related to measurement, data, and time telling in early elementary grades.