# 1.NBT 1: -Teen’s & -Ty’s Story & the 2 / 5 / 10 Times Tables (#103)

A Year in the Life: Ambient Math Wins the Race to the Top!
Day 103

For one year, 365 days, this blog will address the Common Core Standards from the perspective of creating an alternate, ambient learning environment for math.  Ambient is defined as “existing or present on all sides, an all-encompassing atmosphere.”  And ambient music is defined as: “Quiet and relaxing with melodies that repeat many times.”

Why ambient?  A math teaching style that’s whole and all encompassing, with themes that repeat many times through the years, is most likely to be effective and successful.  Today’s standard will be listed in blue, followed by its ambient counterpart.

Number and Operations in Base Ten   1.NBT
Extend the counting sequence.
1.  Count to 120, starting at any number less than 120.   In this range read and write numerals and represent a number of objects with a written numeral.

The 2, 5, and 10 times tables are learned experientially and with lots of rhythmic movement in Grade 1.  As mentioned in an earlier post, the 2’s are learned by stepping the numbers: softly while whispering the 1’s, and marching while saying the 2’s out loud.  Eventually the 1’s are dropped and just the 2’s remain.  The 5’s are learned similarly, counting with the same soft and louder pattern: 1-2-3-4-5 6-7-8-9-10 11-12-13-14-15 . . .  After the 5’s are well-known, the 10’s can follow this pattern: 5-10 15-20 25-30 . . . up to 120.

This is one way that counting to 120 can practiced, but it can also be counted in 1’s.  There needs to be a bridge or transition from the numbers 1-12 as they are slowly and carefully taught (each one is accompanied by a story, a geometric form, and lots of movement) on to the -teens and -ty’s (20, 30, 40, etc) up to 100.  In the Math By Hand Grade 1 Binder, lessons are aligned to California State and National Math Standards.  Before the inception of the Common Core, the requirement for Grade 1 was counting up to 100.  (At this time I am not planning on revising the standards since Common Core is so much in flux.  Besides, the old standards are more user-friendly, child-friendly and developmentally appropriate.)  Here is an excerpt from the Math By Hand Grade 1 Binder:

Count, read, and write whole numbers to 100.  Know 2s, 5s, 10s to 100.

Move beyond the number 12 to teach the -teens, with glass gems as counters.  Using a piece of newsprint paper, draw 10 large ovals (about the size of an egg) in a vertical column on the left, spacing them evenly.  Then add gems to each one, 1 for 11, 2 for 12, etc.  Replace the gems with color dots, and write each number and its word out on the right side.  Have the child(ren) copy yours as you model it on paper or the board.  Note that the words for eleven and twelve are different.  Their origins go back to the early use of Arabic numerals.  The word “eleven” comes from an Old English word meaning, “one left over.”  And “twelve,” from a word meaning “two left over.”  Except for thirteen and fifteen, the rest just add the suffix -teen to the number.  Both suffixes -teen and -ty derive from the word “ten.”  Try telling a story like this while showing it visually.

Once upon a time, the numbers were happy to be a small family, from 1 – 10.  They knew and understood each other very well, though each one was so different.  Then one day, they were asked to count 2 more things than 10.  They called the first one “eleven” or “one left over,” and the second one, “twelve,” or “two left over.”  Then, they were called upon to count so much more, that they needed to put the numbers together with 10.  That’s how the -teens came about, with all the numbers having to stand next to 10.  The numbers stood SO close together, that they squeezed the “0” out.  Then the things that had to be counted grew and grew to be so many that the 10’s had to stand together, asking all the other numbers to stand there with them.  These were called the -ty’s (say “tees”).  So, twenty is two 10’s, and thirty is three.  First, all of the “1’s” were squeezed out by the other numbers, then the other “0’s” were.   So, for example,  3 10s became 30, and 3 10s + 3 became 33!

Include all the numbers to 90, then say that one hundred is ten 10’s.  No need to show all the numbers visually, just a sampling’s enough.  Be sure to use the Real Numbers as props, then go on to illustrate the -teens and -ty’s on separate pages.

So, the child is brought along slowly and carefully, in a very pictorial way.  Lots of illustration and color make up the heart of this lesson and activity, and all of the standard is covered, except for Count to 120 starting at any number less than 120.  When teaching from the whole to the parts, there is no need to rush into abstraction.  If the numbers are known in sequence and counting order, picking the whole apart can come a little later.  But the lesson on -teens and -ty’s does build an excellent foundation for being able to do this, because of the fact that within any group of -ty’s numbers follow the known sequence (1-2-3-4-5-6-7-8-9).

Knowledge ensues in an environment dedicated to imaginative, creative knowing, where student and teacher alike surrender to the ensuing of that knowledge as a worthy goal.  More on the Common Core Grade 1 Number and Operations in Base Ten Standards along with their ambient counterparts tomorrow!