This document outlines a lesson plan on measuring time using seconds and minutes. It includes fluency practice with telling time, counting by sevens/eights/nines, and an application problem about tying shoes. The concept development has students use a stopwatch to time activities and explore seconds and minutes as units of measurement. They discuss how time is continuous and stopwatches only measure portions of ongoing time. The lesson concludes with a problem set, debrief, and exit ticket to assess understanding.