Working on Math

1. Demonstrate if a number (up to 100) is even or odd. 
   
2. Describe order or relative position, using ordinal numbers (up to tenth). 
   
3. Represent and describe numbers to 100, concretely, pictorially and symbolically. 
   
4. Compare and order numbers up to 100. 
   
5. Estimate quantities to 100, using referents. 
   
6. Illustrate, concretely and pictorially, the meaning of place value for numerals to 100. 
   

The above statements are some of our objectives for the second grade in Alberta.  We have been focussing on all of these since the beginning of the school year.  The students need to have a solid understanding of these concepts of place value of numbers so that when they begin to add two digit numbers up to 100 and subtract two digit numbers from 100, they will see if the answer is reasonable.

To demonstrate the use of base ten blocks, the students looked at these manipulatives online.

As a group of ten was moved onto the screen, the tens number increased.  As a single unit block was added, the ones number increased.

There were many different work areas around the class for the students to move to.

 Each student was to manipulate (move around) the base ten blocks to create the two digit number found on the ghost.  Once done, they were to fill in the sheet on their clipboard.  How many tens are there in 39?  How many ones are there in 39?

Some of the students understood this concept and were able to explain the number of tens and ones without using the manipulatives.  Some needed reminders of how to create the number, then count the tens and ones for the answers.  Some were unable to grasp the concept.

Often, the students need many, many chances to work with these numbers to feel comfortable with the concept.  It is so important that they see themselves as working towards understanding, instead of  beginning the negative self talk.  This is why we work on a growth mindset so the student can say "I need to think about this some more" or "I don't know how to do this YET"

I love the talking I hear.  The best comment I heard as they were working today was "I don't know how I got so smart!"