The effectiveness of creative problem-solving learning on critical thinking skills and stoichiometry learning outcomes of grade X Students at SMKN 1 Bakung Blitar Indonesia

Stoichiometry material includes concepts and algorithms, involving relative atomic mass, relative molecular mass, reaction equations, chemical laws, mole concepts, and chemical calculations. Conventional learning methods using lectures are considered less effective, causing low student understanding and grades. The Creative Problem Solving model is proposed as a solution, promoting collaboration, freedom of learning, and linkage to practice. The quasi-post-test experiment showed significant differences in critical thinking abilities and learning outcomes between classes using the Creative Problem Solving and Problem Solving models, with higher scores in the Creative Problem Solving class.