This is the first time students encounter clocks in the CCSS standards. Students are expected to tell time to the hour and half hour in first grade, and to the 5 minutes in 2nd grade. This lesson asks students to compare hour and half hour times. This gets at a rigorous level of Bloom's: students are expected to notice similarities and differences. This also helps students not confuse hour and half hour in later lessons!
Yesterday we learned how to tell time to the half hour. To get our brains ready, let's review the steps for telling time and practice a few times together.
This is important because we have to be able to tell any time we see on the clock!
Your thinking job today is: How does the clock look different when it is showing time to the hour and half hour?
I'll have a Venn Diagram on the board. On one side, I"ll have a clock that shows 10:00 and one that shows 10:30. See attached picture for our diagram!
Present problem: I have 2 clocks here. We do important things at both of these times. But the problem is, I can’t figure out which one is which! I am not sure which one is 10:00 and which one is 10:30. Does anyone think they know?
Let’s look at the clocks carefully. How are they the same?
Now how are the clocks different?
I'll go through list and challenge each thing on the list:
See the Class Chart for the list we made as a class!
I’ll show two clocks for this activity. I’ll show the clocks one at a time and have students write the time on their white boards. Then I’ll ask some of the guiding questions after each clock time.
Whiteboards help me address misconceptions right away with students. It is an effective engagement strategy because all students are having to think and provide an answer. Then I can quickly assess in the moment if I need to address something whole group, or if I need to address a misconception with an individual student.
Group A: Intervention
Students pay attention to where the minute hand is-on the half or whole hours. Circle the matching time. When students finish, they will start the Group B work.
See video of a student talking through one of the clocks on the clock sort. She had just completed the Group A work and had moved on to the Group B!
Group B: Right on Track
Students sort half hour and hour clocks and write the times that match the clocks and then write how they are all the same in each column.
Group C: Extension
Students sort half hour and hour, but have the added challenge of the quarter hour. Can students differentiate between all three times?
See attached documents for independent practice!