Abstract: A teaching apparatus for teaching how to take measurements to connect two pieces of pipe whether or not such pieces are offset from each other or in a straight line. The apparatus includes a main support, an upstanding post laterally movable on the main support, a first pipe section holder on the post selectively movable vertically therealong and a sub-support spaced from the main support having an upstanding flange member laterally movable on the sub-support having a second pipe section holder thereon angularly adjustable with respect to the flange member on the sub-support. The pipe section holders can be used to clamp a pipe section therein and adjusted to set up a predetermined spacing and angular relationship between the unconnected pipe sections. The angularity of the main support and the sub-support in their horizontal planes can also be adjusted. In this manner, the apparatus can be used to teach the interconnection of the pipe sections or to actually determine the proper coupling therebetween.