Allow students to attach files to essay questions

Certain Moodle activities (Glossary, Forum, Database, and Wiki) allow students to attach a file while others (Quiz essay question, Lesson, online Assignment, and Journal) do not. Since math and science teachers rely more on these "traditional" activities, the deficiency hurts us most. In a geometry course, for example, I would like my students to explain the steps of a construction in the body of an essay question and then attach a GeoGebra worksheet. This is currently impossible, and there are no good workarounds.