Abstract: A plug-board type apparatus permits the interconnection of electrical conductors and components having conductive leads as an aid in the instruction of students in electricity and electronics. A panel of insulating material has a plurality of openings to receive the leads. A plurality of cavities are positioned opposite the openings, each of the cavities being accessible to leads through a different set of the openings. A pair of coiled contact springs are positioned in each cavity to receive and hold therebetween electrical leads which are inserted through the openings.