Wikis and collaborative learning allow students to work together online. Wikis are websites that give students access to online resources, opportunities for discussion, and the ability to edit and share information. Collaborative learning involves students and teachers sharing knowledge and authority, with heterogeneous groups working together as equals. The benefits of online collaborative learning include improved self-esteem, reduced anxiety, understanding diversity, and stimulating critical thinking. However, lack of face-to-face interaction and technical issues can cause problems, and some topics may require more teacher guidance. While online groups can collaborate without a teacher, they still need some form of leadership.