This short video and interactive assessment activity is designed to give fourth graders an overview of 24-hour clocks.

Acceleration (a) is the change in velocity (Δv) over the change in time (Δt), represented by the equation a = Δv/Δt. This allows you to measure how fast velocity changes in meters per second squared (m/s^2). Acceleration is also a vector quantity, so it includes both magnitude and direction. Created by Sal Khan.

This short video and interactive assessment activity is designed to teach second graders an overview of am and pm.

This short video and interactive assessment activity is designed to teach fourth graders about time and rate problems.

This short video and interactive assessment activity is designed to teach fifth graders about total length - challenge problems.

This short video and interactive assessment activity is designed to teach fourth graders about determining task length.

Identifying equivalent periods of time  -- Mathematics Instructional Plans (MIPs) help teachers align instruction with the 2016 Mathematics Standards of Learning (SOL) by providing examples of how the knowledge, skills and processes found in the SOL and curriculum framework can be presented to students in the classroom.

This short video and interactive assessment activity is designed to give fourth graders an overview of analog and digital clocks.

This short video and interactive assessment activity is designed to teach second graders an overview of elapsed time.

This short video and interactive assessment activity is designed to teach third graders an overview of telling time to 1-minute intervals.

This short video and interactive assessment activity is designed to give fourth graders an overview of elapsed time.

This short video and interactive assessment activity is designed to teach fourth graders about elapsed time in a sequence of events - word problems.

This short video and interactive assessment activity is designed to teach fifth graders about determining duration time - one step with timeline.

This short video and interactive assessment activity is designed to teach fifth graders about determining the elapsed time given start and end time.

This short video and interactive assessment activity is designed to teach second graders about determining time changes in 5-minute intervals.

This short video and interactive assessment activity is designed to teach fourth graders about ending time in 5-minute intervals - word problems.

This short video and interactive assessment activity is designed to teach third graders about solving for beginning time in 5-minute intervals - word problems.

This short video and interactive assessment activity is designed to give fifth graders an overview of speed based problems.

This short video and interactive assessment activity is designed to give fourth graders an overview of speed based problems.

This short video and interactive assessment activity is designed to teach second graders about beginning, ending, and elapsed time with clocks - word problems.