The video tutorial introduces third-graders to the concept of elapsed time, explaining it as the time between two events. It presents two methods for calculating elapsed time: the Mountains, Hills, and Rocks method using a number line, and the T-chart method. The tutorial provides step-by-step instructions for both methods, using a specific example of calculating the time between 6:40 and 9:20. It concludes with a discussion on potential challenges and the importance of practice.

What is the main focus of the lesson on elapsed time?

• Calculating speed and distance

• Solving multiplication problems

• Understanding elapsed time between events

• Learning to read clocks

What does the term 'elapsed time' refer to?

• The time shown on a clock

• The time it takes to travel a distance

• The time between two events

• The time it takes to complete a task

In the number line method, what do 'mountains' represent?

• Minutes

• Seconds

• Hours

• Days

What is the purpose of using 'hills' in the number line method?

• To represent seconds

• To represent a flexible time increment

• To represent days

• To represent weeks

In the number line method, what do 'rocks' represent?

• Hours

• Days

• Minutes

• Seconds

What is the first step in using the number line method?

• Drawing a clock

• Calculating the total time

• Drawing a number line with start and end times

• Writing down the elapsed time

How many hours are added in the example using the number line method?

• Three hours

• Two hours

• Four hours

• One hour

What is the total elapsed time calculated in the number line example?

• 3 hours and 20 minutes

• 2 hours and 40 minutes

• 2 hours and 20 minutes

• 1 hour and 30 minutes

What is the T-chart method used for?

• Solving equations

• Measuring distances

• Drawing a timeline

• Calculating elapsed time using a chart

How is the T-chart method similar to the number line method?

• Both use a clock

• Both use a chart

• Both involve adding time increments

• Both require drawing