Teen Number Shape Artists ✨ cross-curricular

Teacher: TeacherAI | Grade: K | Subject: Math, Visual Arts, Technology | Duration: 60 minutes

📝 Description: Students create artwork using exactly 11, 12, or 15 shapes, then describe their compositions using teen number language and counting skills.

Standards

K.OA.5 (Fluently add and subtract within 5)
K.NBT.1 (Compose and decompose numbers from 11 to 19 into ten ones and some further ones)
VA:Re7.1.Ka (Identify uses of art within one's personal environment)
VA:Re7.2.Ka (Describe what an image represents)
TECH.K.1.a (With help, identify a simple learning goal and use technology to work toward it)
TECH.K.1.c (With guidance, use technology to show what was learned)

Learning Objectives

Students will be able to:

Count and identify teen numbers 11, 12, and 15 using concrete objects
Create artwork using exactly one of the target teen numbers of shapes
Compose teen numbers by combining different types of shapes (circles, squares, triangles)
Describe their artwork using mathematical language including shape names and quantities
Use technology to document and present their mathematical art creations
Explain how different shapes were combined to reach their target teen number

Supplies Needed

Construction paper (various colors)
Scissors
Glue sticks
Counting manipulatives (cubes or bears)
Tablets or Chromebooks
Chart paper

Lesson Structure

Opening (5 minutes)

Show students pre-cut shapes on the whiteboard. Count together: "Let's count these circles: 1, 2, 3... 10! And these squares: 1, 2, 3! How many shapes total?" Introduce today's challenge: "Artists, you'll create pictures using exactly 11, 12, or 15 shapes!"

Main Activity (50 minutes)

Step-by-step instructions:

Number Selection & Planning (8 minutes): Each student chooses 11, 12, or 15 as their target number. Using counting manipulatives, they practice making their chosen number and explore different combinations (e.g., "I can make 12 with 10 cubes and 2 more cubes").
Shape Cutting Preparation (10 minutes): Pre-cut basic shapes (circles, squares, triangles) from construction paper, or have students cut simple shapes with adult assistance. Create variety in sizes and colors. Students count out exactly their target number of shapes.
Art Creation (15 minutes): Students arrange and glue their exact number of shapes onto white paper to create a picture (house, animal, person, abstract design). Emphasize that they must use ALL their shapes - no more, no less.
Counting Verification (5 minutes): Students count their glued shapes with a partner to verify they used exactly their target teen number. Use manipulatives to double-check if needed.
Description Writing (7 minutes): Help students compose sentences describing their art: "I used ___ circles and ___ squares to make my ___." Write these on sentence strips or help students write simple versions.
Digital Documentation (5 minutes): Using tablets, students photograph their artwork and record themselves reading their description sentence, creating a digital portfolio of their mathematical art.

Closing (5 minutes)

Gallery walk: Students display artwork and share descriptions. Create a class chart showing different ways to make each teen number using various shapes.

Quick Check: "Show me 12 fingers. How many shapes did Maria use? Can you make 11 a different way than Tommy did?"

Formative Assessment

During the lesson, look for:

Students accurately counting to verify they have exactly their target teen number of shapes
Ability to compose teen numbers using different combinations of shape types
Clear mathematical descriptions that accurately describe their artwork's components

Differentiation Strategies

Support for Struggling Students:

Start with 11 shapes only and provide pre-cut shapes to reduce cognitive load
Use manipulatives alongside shapes for constant counting support
Provide sentence frames: "I used ___ [shape] and ___ [shape] to make my ___"

Challenge for Advanced Learners:

Create artwork using exactly 15 shapes with at least 4 different shape types
Write multiple description sentences showing different ways to compose their teen number
Help classmates verify their shape counts and suggest alternative arrangements

ELL/ELD Support:

Pre-teach shape vocabulary with visual cards and gestures
Partner ELL students with strong English speakers for description writing
Use digital tools to record descriptions in home language as well as English

Printable Materials

My Teen Number Art Description

My target number: _______ shapes

I used:

_____ circles

_____ squares

_____ triangles

_____ other shapes

My art shows: _________________________________

Complete sentence:

I used _____ _________ and _____ _________ to make my _________.

Ways to Make Teen Numbers

Target Number	Example 1	Example 2	Example 3
11	10 circles + 1 square	8 triangles + 3 circles	6 squares + 5 circles
12	10 circles + 2 squares	7 triangles + 5 circles	4 squares + 8 triangles
15	10 circles + 5 squares	8 triangles + 7 circles	5 squares + 10 triangles

🔧 Teaching Tools