What time is it?

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SWBAT read analog clock times to the half hour.

Big Idea

I have built a foundation of knowledge for my students to know what an analog clock is and how to read it to the hour. Now it is time to break the clock in half and learn half hour.

Rev Them Up

5 minutes

One of the best things I have found I can do before teaching a new concept is to connect to previous lessons or prior knowledge that I know my students have. I completed a previous lesson with my students on the difference between analog and digital clocks and how to read time to the hour on analog clocks. If you have not introduced clocks yet, please go here and complete this lesson first. If you have not taught time to the hour, go here.

I will begin with a review for reading time to the hour on an analog clock and how to write it in digital form. I have a class set of plastic practice clocks that we will use. I will ask my students to find different times on their clocks, and then I will record the time we found in digital format on the board. Watch the video in the resource section of part of our review. My goal is for them to use the structure of the clock that they have learned to be able to read new times (MP7).

Whole Group Interaction

15 minutes

I will be using the same plastic clocks to introduce time to the half hour. There are five main concepts I want to make sure and cover with my students. 

  • the minute hand is larger because it has to point at the minutes along the edge.
  • the hour hand is shorter because it only has to point at the large hour numbers.
  • the minute hand makes the hour hand move.
  • when it is 1/2 past the hour, the hour hand will be between two hour numbers, example: half past 4 would place the hour hand between 4 and 5, student must be taught it is still 4
  • the clock hands rotate in only one correct direction.

I will use several examples to present each of these concepts to my students. The hardest thing to understand in this lesson is the fourth bullet: when it is 1/2 past the hour, the hour hand will be between two numbers, and they must go with the one it just went past.  I will make sure to focus a lot of discussion on this aspect of analog clocks today and use a lot of questioning to get students to start to internalize how the hour hand and minute hand work together to show the time when it's between hours.

Then, I will provide several clock times for my students to find on their own.  It will be very important to walk around and observe how everyone is doing. I will ask them to place one hand on their head if they get stuck. Check out these videos of an advanced student working and conveying how the hour changes.

Independent Practice

10 minutes

Need: toilet paper or paper towel rolls, print the recording sheet from the resource section, pre-label the recording sheet with student's names, then make copies.

My students will be making watches to practice reading time to the half hour. Cut the paper rolls into 2 1/2" wide pieces. Then cut one slit, so they will be able to slip it over their wrist. Allow them time to decorate the band. Now pass out one watch face per student and have them glue it to their watch. You will need to show them how to aim the clock with the 12 in the up position before they glue, so students will be successful at reading the time on their friend's wrist.

Common core standards expect our first graders to master reading and writing time to the hour and half-hour on digital and analog clocks (1.MD.B.3). This is very important ground work being laid for these little ones. In the next few years, there will be layers added to the CCSS and they will learn to read time to the quarter hour then on down to the minute. They will also be asked to figure elapsed time, so what we are doing now is very important. Also, it is teaching students to pay attention to a new system of numbers. Knowing the structure of clocks will later help with a whole host of other math concepts: fractions (half past, quarter past, quarter of), skip counting (minutes by 5's), real world applications of addition/subtraction/division/etc., and general mental math (multiples of 6 and 60) (MP7).

You may need to add tape to their watch band to hold it in place. After all the clocks are made, it is time for them to begin reading their friend's watch. Pass out copies of the recording sheet. I would encourage them to read their friend's watches at their group, then they can begin walking around the room to read others.  Watch them solving each others watches and working together. Make sure and show the kids how to hold their arm correctly, so students do not accidentally read a watch that is upside down.

Lesson Extension

5 minutes

Read the Grouchy Ladybug by Eric Carle to your class and really focus on the times the grouchy ladybug picks a new fight. It will review what they know and introduce a clock using a quarter hour.  Pass out the plastic practice clocks and have your students find the times each time the ladybug picks a new fight.

Check Up

5 minutes

Here is a great place to go and custom design your own worksheets. I used it to create our exit ticket for today's lesson.

You can decide exactly what your kids need and create an assessment to check their understanding or just to provide more practice. Many sites offer this ability, but want you to become a member and pay for the service. This is completely free. Enjoy!