When the teacher's role is to guide, providing access to information rather than acting as the primary source of information, the students' search for knowledge is met as they learn to find answers to their questions. For students to construct knowledge, they need the opportunity to discover for themselves and practice skills in authentic situations. Providing students access to hands-on activities and allowing adequate time and space to use materials that reinforce the lesson being studied creates an opportunity for individual discovery and construction of knowledge to occur.