Once you've created a graphics layer (as described in How to add a graphics layer), you need to add graphics to it to display data. In most cases, you'll create graphics using geometries that have been created by actions such as executing a query or drawing a shape on the map.
/ Classtalk : A classroom communication system for active learning. In: Journal of Computing in Higher Education. 1996 ; Vol. 7, No. 2. pp. 3-47 @article{cc819104b3034becb09019ef6c28d94c,
The Importance of Class Discussions. Class discussions offer students opportunities to test their ideas and opinions against the ideas and opinions of their peers. It is important to set the right tone for discussion in the classroom early on in the semester, and to establish a rapport with your students. Studies have shown that students who contribute to class conversations early on in the semester are much more likely to continue contributing to class discussions throughout the semester than those students who remain quiet during the initial few weeks of the term.