Students hypothesize whether vinegar and ammonia-based glass cleaner are acids or bases. They create designs on index cards using these substances as invisible inks. After the index cards have dried, they apply red cabbage juice as an indicator to reveal the designs.

Grade 2: Module 4 of the EL Education K-8 Language Arts Curriculum. In this module, students build their literacy and social-emotional skills through the analysis of literary and informational texts, as they engage in a study of how to care for and conserve the world of pollinators. For more information on getting started with the curriculum, please visit https://curriculum.eleducation.org.

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