We report the activities and issues on the Smart Science School (SSS) for junior high students. The junior high school studentshave learned at Gunma National College of Technology and carried out several experiments . In this paper, three lectures forjunior high students are reported. The first theme is ceramics materials. The participants learned the synthesis andcharacterization of the ruby crystals and fluorescent materials. A clone culture of plants is the second theme. DNA analysis ofcarrots and cucumbers were carried out. The third theme is electric batteries. The participants made Voltaic pile, Daniell cell,and Pb batteries. The experiments of solar cell and fuel cell were carried out.