In learner-centred methods, the teacher/instructor is both a teacher and a learner at the same time. In the words of Lawrence Stenhouse, the teacher plays a dual role as a learner as well âso that in his classroom extends rather than constricts his intellectual horizonsâ.
Two-point perspective has one set of lines parallel to the picture plane and two sets oblique to it. Parallel lines oblique to the picture plane converge to a vanishing point, which means that this set-up will require two vanishing points. Walls in 2-point perspective, converging toward two vanishing points.
We say that the sequence (fn) converges pointwise if it converges pointwise to. some function f, in which case. f(x) = lim. nââ. fn(x). Pointwise convergence is, perhaps, the most natural way to deï¬ne the convergence. of functions, and it is one of the most important. Nevertheless, as the following. examples illustrate, it is not as well-behaved as one might initially expect. Example 5.2. Suppose that fn : (0,1) â R is deï¬ned by. fn(x) =.