A Hands-on Experiment of Caffeine Extraction from Tea Leaves Using Direct Sublimation: Learning Effectiveness for Secondary School Students

• Published in: Journal of chemical education Vol. 102; no. 5; pp. 1856 - 1863
• Main Authors: Horimatsu, Seika, Mizutani, Masanori, Miura, Hiroya, Ohkoshi, Emika
• Format: Journal Article
• Language: English
• Published: Easton American Chemical Society and Division of Chemical Education, Inc 13.05.2025; American Chemical Society
• Subjects: Caffeine; Chemistry; Crystals; Effectiveness; Experiments; Extraction processes; Feedback; Hands on Science; Instructional Effectiveness; Learner Engagement; Learning; Motivation; Reagents; Science Instruction; Secondary school students; Student Evaluation; Student Motivation; Students; Sublimation; Teaching methods; Text analysis; Medicinal Chemistry; Middle School Science; Natural Products; Laboratory Instruction; Manipulatives; Elementary; Hands-On Learning; Physical Properties

Hands-on experiments using everyday materials help students engage with learning and the world around them, increasing learning motivation. This is important for the field of chemistry, given learners’ declining interest in the subject and the association between chemistry and other sciences. Focusi...