Common Core Math · Grade 1

1.MD.B.3 Tell and write time to the hour and half-hour

Tell and write time in hours and half-hours using analog and digital clocks.

Why water teaches this standard well

Students read a classroom clock to know when it is time to check the rain gauge each half hour during a storm-tracking activity, writing down the hour or half-hour each reading was taken. Tying a water observation to a specific time gives clock reading a genuine purpose.

Materials tagged with this code are written to the full standard , and each carries a written note explaining the alignment. See how we review materials.

5 materials aligned to 1.MD.B.3

Lesson plans

Worksheets

Classroom activities

Grade 1 Classroom activity

Drops on the Cold Jar at Pipersfield School

A grade 1 activity in which teams check three sealed jars at the hour and half hour, write each time, and find out why only the ice-water jar turns wet outside.

Science 60 min Answer key