Once students begin developing a concept of base ten, they are ready to find different ways to show a number. These activities are designed to be complted with first and second grade students. We have also included some challenge activities that will be suitable for second and third grade students.
(Haven’t done any foundational lessons yet?..look here: http://www.thecurriculumcorner.com/2012/09/16/beginning-1s-and-10s/.)
Our favorite resource for helping students develop number sense is Teaching Student-Centered Mathematics: Grades K-3 by John A. Van de Walle and LouAnn H. Lovin. If you don’t have it yet, follow the text link to Amazon and purchase the book today (just click on the blue, highlighted title.) It will be worth it!
When helping students aquire this skill, having manipulatives that can be joined and taken apart is useful. Here are some we like. We’ve looked to find the best price along with a good quality item!
Grouping Odd Sets (Common Core 1.NBT.B.2) Give students a collection of unifix cubes or links (we’re going to use unifix cubes for our example.) When you present them with the collection, have the items partially grouped. If your number is 53, you might give the students 4 stacks of 10 and then 13 ones. Before the students count, ask them to tell you how many there are in all – record the answers on chart paper or a board. Talk about the answers students have given and then count to find the actual number. Change the groupings and have students tell how many there are now. Repeat this activity until students begin to understand that the total number does not change because you have grouped the items in a new way.
Show the Number in Different Ways (Common Core 1.NBT.B.2) Print the Different Ways page and give each student a number. Students have to circle the sticks and ones to show how to make the number using different ways to group the tens and ones. Working with second and third grade students who need a challenge? We have created this printable using blocks, sticks and ones. Challenge Different Ways (Common Core 2.NBT.A1)
Guess the Number (Common Core 1.NBT.B.2) Print and laminate these Base-Ten Riddle Cards. They are designed so they can be easily hole-punched on the top left corner and connected with a ring. Students read the riddle and try to solve the problem on each card. Working with second and third grade students who need a challenge? We have created this set for them! Challenge Riddle Cards (Common Core 2.NBT.A1)