The Tecolote Lab: Transforming Waste into Art

Teacher prepares a highly concentrated “Mother Batch” of coffee (reduced by simmering on a stove for 20 minutes) before class. In this phase, students act as material engineers to create their “Bio-Ink” gradient. Ensure each student has a testing strip of 300gsm watercolor paper, four small mixing containers, and a tablespoon.

Execute the Dilution Recipe: Instruct students to create the following four shades in their containers:

Tone 1 (Concentrate): 1 tablespoon of “Mother Batch” + 0 tablespoons of water.

Tone 2 (Dark): 1 tablespoon of “Mother Batch” + 1 tablespoon of water.

Tone 3 (Medium): 1 tablespoon of “Mother Batch” + 3 tablespoons of water.

Tone 4 (Light Wash): 1 tablespoon of “Mother Batch” + 6 tablespoons of water.

Create the Calibration Strip: On the testing paper, students paint a small square of each tone from lightest to darkest.

Persistence Check (VA:Cr2.1.7a): If the tones look too similar, students must persist and adjust their recipes (adding more water or concentrate) until four distinct, visible steps are achieved.

Tip: Label each square with the “recipe” (e.g., 1:3) to ensure the result is repeatable.

Focus on the expressive, “wild” energy of Guatemalan Expressionism. Provide some interesting facts about the artist and provide reference pictures for students to draft. (You could use this presentation as a reference: https://view.genially.com/66f2f4c707f51dc368060515)

Pencil Sketch: Lightly sketch the owl’s silhouette. The owl should be the “hero” of the page, occupying at least 60% of the space.

The Oil Pastel Layer: Use oil pastels for the iris of the eyes to create a vibrant “pop” against the earthy coffee.

Technical Note: Press firmly with the pastels. The heavy wax layer is what prevents the coffee tint from soaking into those specific areas, preserving the highlights.

This is where the process is synthesized into a final masterpiece. Provide the following instructions to the students:

• The Base Wash: Start with Tone 4 (Lightest). Brush a light layer over the entire body of the owl. Observe how the coffee “beads up” and rolls off the oil pastel lines.
• Building Form: While the paper is still slightly damp, use Tone 3 and 2 to add shadows under the wings and around the face. This creates a soft, organic gradient.
• Expressive Details: Use Tone 1 (Concentrate) for the final “Amaya” touches. Use a fine-tip brush to add deep, dark lines around the eyes and beak.
• Sustainability Reflection (SDG 12): As students work, prompt them to observe the smell and texture. Discuss how this “waste” product is creating a professional-grade aesthetic without the use of microplastics found in acrylics.

Drying: Lay the works flat to prevent the coffee from pooling and creating “tide lines”.

-The “Sustainable Defense” Reading: Provide students with the following text: Art with a Conscience: From Plastic to Pigment

-Gallery Walk & Peer Q&A: Students rotate in silence for 5 minutes. After the walk, each student must “defend” their work by answering these two questions for a peer:

• “Which ‘tone’ from your recipe was the hardest to control and why?”
• “How did using a natural biomaterial like coffee change the way you thought about your owl’s texture compared to plastic paint?”

-Written Evaluation (Exit Ticket): Students answer the questions provided in the reading document.

-Final Reflection: Students complete the final reflection provided in the reading document.

DISPLAY SHORT VIDEO OF MY STUDENTS WORK: Tecolote Amaya Project

1. The “Tecolote Amaya & Coffee Tint” Summative Rubric

• Use this 4-point scale to grade the final “Amaya Owl” and the Tonal Calibration Strip.
• Technical Mastery: Does the tonal strip show 4 distinct steps from light to dark?
• Artistic Integrity: Does the owl use the concentric eyes and radiating lines typical of Arnoldo Ramírez Amaya?
• Persistence (VA:Cr2.1.7a): Did the student adjust their water/coffee ratios when the tint didn’t behave as expected?
• Sustainability (SDG 12): Can the student explain the difference between biodegradable coffee and microplastic-based acrylics?

2. Student Exit Ticket (Evaluation Questions)

Have students answer the four targeted questions at the end of the “Art with a Conscience: From Plastic to Pigment” reading document to check for understanding:

• Environment: How does washing synthetic acrylic paint down the drain eventually affect the ocean’s food chain?
• Tech/Measurement: Why is it necessary to use a standardized recipe (like our tablespoon ratios) when engineering a biomaterial?
• SDG 12: In your own words, define a “Circular Resource” using your coffee grounds as an example.
• Tonal Value: Point to your darkest concentrate and lightest wash. How did these two different values help make your owl look 3D?

3. Final Reflection Prompt

Ask students to complete this “Bridge Sentence” in their learning diaries:

• “I used to think of coffee waste as ________, but through this lab, I discovered it is a ________. This experience taught me that being a sustainable artist means ________.”