K-2 Mathematics Resources for Parents/Guardians
Videos for "One more or one less"
This video covers Kindergarten standards NR.1.3 and NR.2.1. Students will need to be able to identify a given number that is between 1 and 20, and identify the numbers that are "one more" than the given number and "one less" than the given number. Students must also be able to count forward to 100 by tens (ex. "ten, twenty, thirty" etc.). Students must also be able to start counting at the number 20, and count backward from there to get to 1. There are a variety of manipulatives that students can use to achieve these skills, which are demonstrated in the video. The tasks that are provided under each manipulative tab will allow students to practice using each manipulative.
Standard code and description: K.NR.1.3 and K.NR.2.1; Given a number from 1-20, identify the number that is one more or one less; Count forward to 100 by tens and ones and backward from 20 by ones.
- One More, One Less Video Link opens video in a new tab.
One More or One Less Tasks
The above link is a task involving hundred charts, starting at 40.
If students are asked to start at the number 40, then they should be able to count forward to 100 by tens.
Some questions to ask your child are as follows:
- Starting at 40, what number is 10 more?
- Starting at 40, what number is 10 less?
- Count forward from 40 to 80 by 10s, how many times will you count up by ten?
The above link is a task involving hundred charts, one starting at 6 and the other starting at 13.
If students are asked to start at the number 6, then they should be able to count forward to 20 by ones.
If students are asked to start at the number 13, then they should be able to count forward to 20 by ones.
Some questions to ask your child are as follows:
- What is the number that's highlighted in red?
- What number is one more than 6? How do you know?
- What number is one less than 6? How do you know?
- What is the number that's highlighted in blue?
- What number is one more than 13? How do you know?
- What number is one less than 13? How do you know?
The above link is a task involving number lines.
If students are asked to identify 5, they should be able to identify the number that is one more or one less.
Some questions to ask your child are as follows:
- What is the number that comes before 5? How do you know?
- What is the number that comes after 5? How do you know?
The above link is a task involving snap cubes.
If students are asked to start at the number 6, then they should be able to count forward to 20 by ones.
If students are asked to start at the number 13, then they should be able to count forward to 20 by ones.
Some questions to ask your child are as follows:
- How many red snap cubes are there?
- What number is one more?
- What number is one less?
- How many blue snap cubes are there?
- What number is one more?
- What number is one less?
The above link is a task involving color tiles.
If students are asked to start at the number 3, then they should be able to count forward to 20 by ones.
If students are asked to start at the number 6, then they should be able to count forward to 20 by ones.
Some questions to ask your child are as follows:
- How many blocks are there in the top representation?
- What number is one less than that?
- What number is one more than that?
- How many blocks are there in the bottom representation?
- What number is one less than that?
- What number is one more than that?