i-Ready Classroom Mathematics Kindergarten, Unit 6: Counting to 100 and Measurement
In this unit, the year's last, counting and measuring sit side by side. Your child counts to 100 by ones and tens, counts on from any number, compares objects by length and weight, and sorts things into groups to count. After adding and subtracting to 10, this broadens your child's math into the real world of sizes and amounts, ready for first grade.
By Robert “Bobby” BarnettMath teacher, parent, and founder of Bobby’s Math Club
What is my child learning in Unit 6?
- Counting to 100 by ones and by tens, moving smoothly from one ten to the next, such as 79 to 80. Learn more about counting to 100 by ones: Counting to 100 by ones · Learn more about counting to 100 by tens
- Counting forward from any number within 100, such as 56, instead of starting over at 1. Learn more: Counting on from any number
- Describing objects by things that can be measured, such as length, how long, and weight, how heavy. Learn more: Describing how long or heavy things are
- Comparing two objects side by side or by lifting, and saying which is longer, shorter, heavier, or lighter. Learn more: Comparing which is longer, taller, or heavier
- Sorting objects into groups, counting each group, and putting the groups in order from most to fewest. Learn more: Sorting things into groups and counting them
Sample questions to try together
These are real questions from our practice. Tap the speaker to hear one read aloud, or the light bulb for a hint, and talk about the answer together.
Question 1 of 3
What comes next? 10, 20, 30, 40, __
- 60
- 50
- 41
How you can help
- Take turns counting to 100 on a long walk or ride, switching who counts at each ten, and pause at 79 or 89 so your child names the next ten.
- Compare two things at home, such as a spoon and a spatula, first by length and then by weight, and let your child explain which is which.
- Sort the shoes by the door into groups, count each group, and ask your child to put the groups in order from most to fewest.
Where kids can get stuck
- Going back to 1 to continue a count, even after counting '54, 55, 56' correctly.
- Assuming the longer object must also be heavier, without lifting both to check.
- Ordering groups by the space they take up rather than by how many are in each.
Practice makes perfect
Bobby's Math Club has practice problems that adapt to your child’s level, each with a detailed explanation and an easy-to-follow video, so your child can build confidence in these skills one step at a time.
Words your child will hear
- count by tens
- Saying 10, 20, 30, and so on, up to 100.
- count on
- To start counting from a number other than 1, like 23, 24, 25.
- hundred
- The number 100, which is the same as ten tens.
- length
- How long something is from one end to the other.
- weight
- How heavy something is.
- longer
- Stretching further from end to end than something else.
- heavier
- Weighing more; harder to lift.
- sort
- To put things into groups that belong together.
Want to help your child master counting and measuring?
In Bobby's Math Club, your child practices these skills at just the right level, with a hint when they need one, a clear explanation after every question, and kid-friendly videos. Unlimited practice is free.
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Written by Robert “Bobby” Barnett
Bobby is an award-winning math teacher, the author of Meet Every Learner’s Needs, and the father of two elementary-school math learners. He uses Bobby’s Math Club with his own kids a few times every week. Learn more or contact Bobby.
Which math standards does i-Ready Classroom Mathematics Kindergarten Unit 6 cover?
i-Ready Classroom Mathematics Kindergarten Unit 6 covers these math standards. Each one links to what it means, sample questions, and teaching strategies.
For teachers: Unit names and order vary between editions and districts, so your school’s own materials have the exact sequence. Learn how Bobby's Math Club can help your students grow.