The research aims to identify how to develop conceptual Understanding and curiosity among fourth-grade primary students using the hot chair strategy, and the researcher prepared research tools represented in the conceptual Understanding test and curiosity scale, The experimental method was used as a semi-experimental design with two equivalents. A control group of (38) pupils and an experimental group of (36) pupils at Al-Aslouji Primary School 2 shared Zigzag Center, Sharkia Governorate