Maths Resource House mascot: a robot with a surfboardMaths Resource HouseGrade 4 · targets, lessons & assessments
Unit 5: Metric System & Data
Target 434.MD.A.1 / 4.MD.A.2[New] Target — Elapsed Time

I can convert between hours, minutes, and seconds and solve problems about elapsed time.

Standard cap: 4 - Solve multi-step elapsed-time situations crossing the hour and justify the strategy.

Subskills what students must be able to do

  • 1I can convert hours to minutes and minutes to seconds.
  • 2I can find elapsed time using a number line or clock model.
  • 3I can find a start or end time when given the elapsed time.

Proficiency Scale & ⚓️ Tasks

1 → 4 proficiency scale
1Beginning

“How many minutes are in 3 hours?”

2Developing

“A movie starts at 2:45 and lasts 1 hour 30 minutes. When does it end?”

3Proficient

“Practice starts at 3:50 and ends at 5:15. How long is practice? Show your thinking on a number line.”

4Advanced

“Two students found the elapsed time from 10:40 to 1:05 differently — one counted up and one subtracted. Analyze both strategies, find any errors, and explain which is more reliable across the hour boundary.”

Teach

Lessons and videos that introduce the skill3