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Monday, September 12, 2011

Crew News September 12, 2011

Counting by 5s
You might be wondering why we are learning to count by 2s and 5s and 10s (and maybe other numbers). One important reason is that learning to count by various numbers makes learning about multiplication and the multiplication facts in future years so much easier. We do have other reasons that are applicable to what we will be learning this year.

One reason is to make it easier to count out combinations of coins. We learn all about coins and counting combinations of coins and making change and much more in first grade. If we can count by 5s, then we can count out money amounts using nickels. If we can count by 10s, then we can count out money amounts using dimes. This is also why we are learning to count tally marks - it leads directly into counting out amounts of money using nickels and pennies.

Another reason to learn to count by 5s is that we will use this skill when we begin to tell time on an analog (not digital) clock. Last week we learned to tell time to the nearest hour. We will need to be able to count by 5s to determine times like 2:05, 3:15, 4:35 and so on.

As you can see it will be very important for us to all be able to count by 5s in the very near future. It is a great thing to practice while driving around in the car, standing in line, waiting for a doctor's appointment, while waiting for dinner in a restaurant. The whole family can participate. There are also some fun online games on the Resources page of this blog that will help your child practice these skills. We will be learning about them this week and your child can also play them from home. (More about that in an upcoming blog post.) Once your child can count by 2s, 5s and 10s, they can try to count by other numbers, too.

I am sending home a number grid that you can keep at home to use if your child needs a little help when practicing counting by 2s, 5s, and 10s.

Reading ~ Read a good book or two.
Math ~ Home Link 2.6 Telling Time to the Hour

I am sending home a paper clock for your child to make and keep at home to use to practice time-telling skills as we learn them. Please keep the clock in a safe place so your child will have it for the rest of the school year to use to practice at home.

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