Kits: Mixtures of various components issued as a unit and intended primarily for instructional purposes. No one component is identifiable as the predominant component. Examples are model kits, packages of assorted materials, such as a set of curriculum material (books, workbooks, guides, activities, etc.) or packages of educational test materials (tests, answer sheets, scoring guides, score charts, interpretative manuals, etc.).

Http iframes are not shown in https pages in many major browsers. Please read this post for details.