Abstract: A choke tube wrench for installation and removal of a choke tube in a shotgun barrel, such tool utilizable for a plurality of different gauge shotguns, such tool having an expandable section that fits within the choke tube and is expanded by squeezing the tool's handles together to tightly engage the inside of the choke tube so that upon rotation of the handles, the choke tube can be rotated for either installation in, or removal from, a shotgun barrel.

Abstract: A putt practicing device having a body with an elongated shaped, a forwardly facing surface, a flat bottom surface for being placed on a flat putting surface, a flat surface on the top, elements for stretching either one strip of rubber, or two vertically aligned strips of rubber, just above the flat surface on the top of said elongated shaped body to place said stretched strips of rubber forwardly of the center portion of the forwardly facing surface and form a target area so that a golf ball striking the target area will be deflected away therefrom.

Abstract: An interactive electronic classroom system for enabling teachers to teach students concepts and to receive immediate feedback regarding how well the students have learned the concepts. Structure is provided for enabling students to proceed in lockstep or at their own pace through exercises and quizzes, responding electronically to questions asked, the teacher being able to receive the responses, and to interpret a readout, in histogram or other graphic display form, of student responses. In a preferred embodiment, a central computer using an IBM AT (tm) compatible system is employed, together with a plurality of student computers which range from simple devices to full fledged personal computers. Optical peripheral hardware, such as VCRs or other recording/reproducing devices, may be used to provide lessons to students in association with the computer network.