Creative Explorations: Discovering the Visual World · 2nd Year · Form and Space in Clay · Spring Term

Coil Building: Stacking Forms

Learning to create forms by rolling clay into coils and stacking them to build taller structures.

• NCCA Curriculum Specifications
• NCCA: Primary - Clay
• NCCA: Primary - Form

About This Topic

Coil building teaches students to roll clay into even coils and stack them to form stable, taller structures. In this topic, they follow steps like scoring surfaces with slip, joining coils securely, and smoothing transitions for strength. These skills allow creation of vessels with unique shapes, such as flared rims or curved bodies, while comparing coil methods to pinch pots for different forms.

This work aligns with NCCA Primary standards for clay and form, developing spatial awareness and control over three-dimensional space. Students explore how coil thickness, stacking angle, and support affect stability, fostering problem-solving as forms grow taller. They design and critique their own vessels, building confidence in artistic choices.

Active learning shines here because students handle clay directly, feeling resistance and weight as they build. Trial-and-error with collapsing forms teaches physics of balance intuitively. Collaborative critiques refine techniques, making abstract stability concepts concrete through repeated, hands-on practice.

Key Questions

1. Explain the steps involved in successfully joining clay coils to build a stable form.
2. Design a vessel using only coil building that has a unique shape.
3. Compare the advantages of coil building versus pinch pot techniques for different forms.

Learning Objectives

• Explain the sequential steps for securely joining clay coils to construct a stable, vertical form.
• Design a unique vessel by strategically stacking clay coils, incorporating varied thickness and angles.
• Compare the structural advantages of coil building versus pinch pot techniques for creating specific vessel shapes.
• Critique the stability and aesthetic qualities of a coil-built clay form, identifying areas for improvement.

Before You Start

Introduction to Clay: Pinch Pots

Why: Students need prior experience with clay manipulation and basic form creation to understand the foundational principles of working with the material.

Basic Clay Preparation

Why: Understanding how to wedge clay to remove air bubbles is essential for preventing structural issues in coil building.

Key Vocabulary

coil	A long, snake-like rope of clay, formed by rolling clay between hands or on a flat surface.
slip	A mixture of clay and water, used as an adhesive to join pieces of clay together. It acts like glue for clay.
score	To scratch cross-hatch marks onto the surface of clay where two pieces will be joined, creating a rougher texture for better adhesion with slip.
stacking	The process of placing one coil on top of another to build height and form in a clay structure.
stability	The ability of a clay form to stand upright and resist collapsing, influenced by coil thickness, joining technique, and base support.

Watch Out for These Misconceptions

Common Misconception

Coils stick together without scoring or slip.

What to Teach Instead

Clay needs rough scoring and watery slip for strong bonds; smooth surfaces slip apart. Hands-on trials where unscored coils collapse show this clearly, prompting students to test and refine joins themselves.

Common Misconception

Thicker coils always make stronger forms.

What to Teach Instead

Even, medium coils balance strength and flexibility; too thick causes cracking. Building challenges reveal optimal thickness through direct failure and success, building intuitive judgment.

Common Misconception

Tall forms need no supports during building.

What to Teach Instead

Temporary supports like rolled towels prevent slumping. Student-led experiments with and without supports highlight physics of clay's wet weight, encouraging adaptive strategies.

Active Learning Ideas

Skill Stations: Coil Techniques

Set up stations for rolling even coils, scoring and slipping joins, stacking with supports, and smoothing surfaces. Pairs spend 7 minutes per station, practicing and noting tips on worksheets. End with a share-out of best practices.

45 min·Pairs

Guided Build: Simple Pots

Demonstrate scoring and slipping, then have small groups roll coils and stack three layers for basic pots. Provide wire tools for cutting if forms slump. Groups test stability by gently shaking finished pots.

50 min·Small Groups

Design Challenge: Unique Vessels

Students sketch a vessel with one unique feature, like a handle or curve, using only coils. In pairs, they build to sketch specs, supporting each other with slip mixtures. Display and vote on most stable designs.

60 min·Pairs

Compare and Critique: Coil vs Pinch

Whole class makes a small coil pot and pinch pot side-by-side. Discuss advantages in a circle share: coils for height, pinch for speed. Record group insights on chart paper.

30 min·Whole Class

Real-World Connections

• Potters and ceramic artists use coil building to create large-scale sculptures, decorative vases, and functional pottery like storage jars, often found in galleries and homes.
• Archaeologists study ancient pottery, including coil-built vessels from cultures like the Ancestral Puebloans, to understand past technologies and daily life.
• Architects and builders sometimes use coil-like construction methods for rammed earth walls or certain types of bricklaying, emphasizing strength and material efficiency.

Assessment Ideas

Quick Check

Observe students as they build. Ask: 'Show me how you are scoring and slipping before adding your next coil.' Note which students demonstrate secure joining techniques.

Exit Ticket

Provide students with a small card. Ask them to draw a quick sketch of their coil-built vessel and write two sentences explaining one design choice they made and why it contributes to the form's stability.

Peer Assessment

After completing their coil forms, have students pair up. Each student points out one feature of their partner's work they admire and one area where the coils could be joined more securely. Partners offer a brief suggestion for improvement.

Frequently Asked Questions

How do you join clay coils securely in coil building?

Score both coil surfaces with a fork or wire tool to create texture, then apply slip, a watery clay mix, like glue. Press firmly and smooth the seam. Students master this through repeated practice at stations, checking stability by lifting forms mid-build.

What are the advantages of coil building over pinch pots?

Coils allow taller, more complex shapes with controlled walls, ideal for vessels with necks or handles. Pinch pots suit quicker, rounded forms but limit height. Comparisons via side-by-side making help students see when to choose each technique for their designs.

How can active learning benefit coil building lessons?

Active approaches let students roll, join, and test coils hands-on, experiencing slumps and successes firsthand. This builds muscle memory for even coils and secure joins, while group critiques refine designs. Failures become teachable moments, deepening understanding of form stability over passive demos.

What steps make a stable stacked coil form?

Roll uniform coils, score and slip each join, stack with slight inward angle for balance, and use supports until leather-hard. Test by tapping gently. Scaffolded builds guide beginners to success, with peer checks ensuring even progress across the class.