Core Skills Analysis
Science
The students investigated how bleach concentration affected fabric color change by testing 20%, 50%, and 80% bleach solutions on shirts. They observed that older 100% cotton shirts responded better than newer cotton-blend shirts, which helped them learn that material composition changes how a chemical reaction behaves on fabric. They also discussed hydrophilic and hydrophobic properties while mixing the bleach solution, connecting the activity to how substances interact with water. When they used peroxide to neutralize the bleach, they learned how to stop a reaction at the desired point and control the final result safely.
Art and Design
The students created bleach-dye shirts as a visual art project, using different bleach strengths to produce varied effects. They used shark cutouts to block parts of the bleach, which introduced the idea of silhouettes and how negative space can create recognizable images. The planned addition of screen printing ink and a stencil for the words "Shark Week" showed them how mixed-media design can combine image and text. Through these steps, they practiced making artistic choices that changed the look, contrast, and composition of the shirts.
Math
The activity required students to work with percentage concentrations of bleach, including 20%, 50%, and 80%, which gave them direct experience comparing quantities. They likely noticed that changing the concentration changed the strength of the effect, helping them connect numerical values to real-world outcomes. The one-hour time frame also helped them understand how long a process can take and how to manage an activity within a set period. By comparing results across shirt types and bleach levels, they practiced informal measurement and data comparison.
Tips
To extend this learning, students could record each bleach percentage, fabric type, and final color effect in a simple comparison chart, then discuss which variables made the biggest difference. They could also sketch their shirt designs before applying bleach, labeling where the shark silhouettes and text will go to plan composition and spacing. For a science follow-up, students could test why peroxide stops the bleach reaction by discussing cause and effect and documenting what happens if it is added at different times. Finally, a class critique or gallery walk would let students describe how their design choices changed the final artwork and what they would do differently next time.
Book Recommendations
- The Magic School Bus Gets a Bright Idea: A Book About Color by Joanna Cole: A colorful introduction to how color works and changes, connecting well to dyeing and visual effects.
- What Is a Chemical Reaction? by Bobbie Kalman: A simple science book that helps explain how substances change when mixed, like bleach acting on fabric.
- Swimmy by Leo Lionni: A well-known picture book with strong visual design and silhouette-style imagery that connects to the shark cutouts and design choices.
Learning Standards
- CCSS.MATH.CONTENT.6.RP.A.3 - Students worked with percent concentrations (20%, 50%, 80%) and compared how changes in percentage affected results.
- CCSS.MATH.CONTENT.7.RP.A.2 - Students connected proportional reasoning to real-world effects by observing how different bleach strengths changed fabric outcomes.
- CCSS.ELA-LITERACY.SL.6.1 - Students discussed scientific ideas such as hydrophilic/hydrophobic properties and the role of peroxide during the activity.
- CCSS.ELA-LITERACY.W.6.2 - Students can extend this activity by explaining the procedure, observations, and results in a clear informative write-up.
- NGSS MS-PS1-2 - The activity involved analyzing and describing how substances interact and how a chemical reaction can be controlled or stopped.
- NCAS VA:Cr2.1 - Students used materials and tools to experiment with creative processes and develop an original mixed-media shirt design.
Try This Next
- Make a results chart comparing bleach percentage, shirt material, and final color change.
- Draw a stencil plan for the Shark Week lettering and shark silhouette before printing.
- Write 3 quiz questions about hydrophilic vs. hydrophobic and how peroxide stops bleach.
- Create a before-and-after sketch showing how negative space formed the shark design.