How much do you think? Looks like he has the ten frame so $10.  Then it appears he stops using a ten base system, but I am not sure.  I have thought $10.04, $14.00 or something else.  This is a good example on making sure parents know what is going on in the classroom.  If they are confused maybe some kids are too.

This check went viral a few years ago.  First I will have to agree with the dad, instructions would be nice to accommodate the homework or let the kids do it at school. Several textbook companies actually make reteaching worksheets.  When I taught high school math I would send those home for two reasons.  They did not have to carry a big heavy book home and both the student and the parent would have examples showing them how to do the math homework. I remember years ago (around 1970) that my dad told me that he could no longer help me with my math, even though by 5th grade I was several years ahead of my classmates and had to sit in the corner with my own math book and struggle to figure things out. My father had taught me most of my math up until then and I had run a cash register in our family business. In the 1990's I have several straight A students except, several even gifted in math that I would tutor that were struggling in Everyday Math in school.  Apparently they were not the only ones according to Forbes Article.  I think one of the problems with Everyday Math is no instructions for the parent.  I know one of my kids came home in 2nd grade and I could not figure out what they wanted them to do.  Since then I have since found putting the right number in a 100's board to see if they know their tens from ones is one activity that can confuse parents because they only would show part of the number board.

Not sure what to do?  Look below? Makes better sense there.

From Math Worksheets

 Now the attack seems to be on Common Core Math.  I personally only see the Common Core as a set of standards to use in the United States that can be taught however a teacher sees fit to teach.  Many textbook companies have labeled their textbooks as Common Core and many schools have purchased these books to use in their schools.  The label of Common Core on the textbooks I really see as a textbook companies marketing strategy to make schools think they are on the cutting age of educations and their textbooks have been updated.  It would be hard to believe that any school only "allowed" teachers to teach out of these textbook and not supplement with additional educational material.

The check above shows ten frame, and claims it is Common Core.  Yes it does fit into the standard taken from Core Standards  shown below:

Work with numbers 11-19 to gain foundations for place value.

CCSS.MATH.CONTENT.K.NBT.A.1
Compose and decompose numbers from 11 to 19 into ten ones and some further ones, e.g., by using objects or drawings, and record each composition or decomposition by a drawing or equation (such as 18 = 10 + 8); understand that these numbers are composed of ten ones and one, two, three, four, five, six, seven, eight, or nine ones.

I look at this a bit different.  I see the US finally getting caught up in math.  Years ago I used a website from the Netherlands called Speedy Pictures.  We now have a few of these websites in the U.S.

Fuel the Brain   education.com    Greg Tang   arcademics.com    ictgames.com

amblesideprimary.com   different ictgame

I do think that 10 frames is also a way to replace fingers.  I know that I have had many middle school students that can not quickly add or subtract from 10.  There are eleven ways to make ten or six if you want to include the commutative property sets as they are the identical numbers.

 0 + 10, 1 + 9, 2+8, 3+7, 4+6, 5+5 if you know these you should know 6 +4, 7+3, 8+2, 9+ 1 and 10 + 0

Yet I still see students counting on their fingers in middle school to do the problem 10 - 7.  I think this is the basis for the 10 frame practice, so students can "see" the problem and not have to count.

On another note this is not 10 frame but rather subitizing  numbers I find kids having trouble with.  Some of this is from we do not play board games like Yahtzee very much anymore.  Many of my students have never heard of it.  I played it for hours when I was a kids.

Here is an example of a common problem that I have and how I have solved it (or how I do it in my head).

Put up seven fingers.

Can you show me another way?

I am not sure. There is not another way.

Try this....move a finger from one hand to the other hand.  In other words, put a finger down on your left hand then put a finger up on your right hand.

Yes, you did it!

Definition from Teach Math 

"Subitizing is the ability to 'see' a small amount of objects and know how many there are without counting. Subitizing is what tells you what number you roll on a six sided dice – most adults no longer have to count the pips after playing board games for a while."

Resources for Numeracy:

K-5 Math Teaching Resources      Math Recovery     mathlearningcenter.org  You Tube