Grade K Counting 10-20 — Printable No-Prep Worksheet

This worksheet gives Kindergarten students essential practice in counting numbers from 10 to 20. Using the foundational ten-frame model, learners build number sense by seeing teen numbers as a group of ten and some ones, which solidifies early place value understanding.

At a Glance

• Grade: K · Subject: Math
• Standard: CCSS.MATH.CONTENT.K.NBT.A.1 — Compose numbers 11-19 into a ten and some ones using objects.
• Skill Focus: Counting 10-20 with Ten Frames
• Format: 3 pages · 12 problems · Answer key included · PDF
• Best For: Independent practice, math centers, or homework
• Time: 15–20 minutes

What's Inside

This PDF includes three student worksheet pages, each with four problems for counting numbers from 10 to 20. A separate, one-page answer key is also provided for easy checking. The clean layout features large ten frames and clear images to help learners focus on the counting task.

A Simple Workflow for Busy Teachers

This worksheet is engineered for efficiency, saving you valuable prep time.

• Print (1 min): Print the three worksheet pages for each student. The PDF is optimized for clear printing on standard paper.
• Distribute (1 min): Hand out the pages. The task is self-evident: students count the objects and write the numeral in the box.
• Review (2 min): Use the single-page answer key to review work quickly with the class or check papers individually.

With a total prep time of under five minutes, this is an ideal resource for substitute plans or homework.

Core Standard Alignment

This worksheet directly aligns with CCSS.MATH.CONTENT.K.NBT.A.1, which requires students to "compose and decompose numbers from 11 to 19 into ten ones and some further ones." The ten-frame model is a core strategy for this place value concept. It also supports counting skills from CCSS.MATH.CONTENT.K.CC.B.5. Both standard codes can be copied directly into lesson plans or curriculum maps.

Classroom Application

This resource is highly flexible. Use it for independent practice after a whole-group lesson on composing teen numbers. Alternatively, place it in a math center for students to complete in pairs, reinforcing their counting and number-writing skills. For a quick formative assessment, observe if students are counting all objects or using the "10 and some more" strategy. Most students can complete the 12 problems in about 15-20 minutes.

Built for Early Learners

This worksheet is designed for Kindergarten students learning numbers 10-20. It is also great for first graders needing a quick review of place value at the start of the year. The visual nature of the ten frames provides scaffolding for all learners. This resource pairs well with hands-on manipulatives like counters and a physical ten-frame mat to extend the learning.

Foundational number sense, particularly the ability to compose and decompose numbers, is a critical predictor of later math success. This worksheet directly supports the development of this skill as outlined in standard CCSS.MATH.CONTENT.K.NBT.A.1. Research confirms the importance of early number concepts; for instance, the RAND AIRS 2024 report highlights that a strong grasp of base-ten concepts in early grades significantly reduces the need for later intervention. By using the ten-frame model, this resource provides students with a visual and concrete method for understanding that teen numbers are composed of a group of ten and some additional ones. This approach moves beyond simple rote counting to build a durable, flexible understanding of the number system, a key component of effective early math instruction. The 12 focused problems give students repeated practice in this core area of Kindergarten mathematics.