Elapsed Time Basics

Elapsed Time Basics

What students learn

Students learn to find elapsed time by counting on a number line and by using start and end times. Start with Elapsed Time: Use a Number Line so students see the basic counting-on strategy first.

Why it matters

Elapsed time shows up in schedules, routines, and word problems. When students can track minutes on a number line, they can reason about time instead of guessing. Use Elapsed Time: Find Start and End Times to show how the same strategy works when one time is missing.

Learn the idea

A time interval is the amount of time between two events. Students can count forward from the start time, jump through friendly minute chunks, and check the ending time. Watch Elapsed Time: Solve Word Problems to see how the same idea works in a story problem.

Try it

Write a start time and an ending time on paper or a board. Ask the student to count the minutes aloud and explain the jumps they made. If they get stuck, replay the first moment and have them follow the line with a finger.

Parent guide

Use daily routines like cooking, reading, screen time, or getting ready for school. Ask, "How long did that take?" and "What time will it end?" Keep the work short and visual so the student can point to the start, the jumps, and the answer.