Pernilla Pergert, RN, Ph.D. Abstract The experience of minus mentoring in learning classic grounded theory (CGT) is shared by many people over the world. The aim of this article is to share experiences of learning and using CGT. Data for the article included methodological discussions in the author’s thesis and articles, as well as memos. Consequences of learning grounded theory by doing are presented in the form of challenges and lessons learned but also some rewards. Challenges and lessons learned include sampling-confusion, delimiting-disregarding, judging saturation and conceptual language-struggling. Rewards include trusting the method, insider-researcher and expert-resourcing. Presented rewards could be seen as advice and inspiration for novice GT researchers. Introduction Grounded theory (GT) is an inductive method, useful and suitable for qualitative data. It is highly appropriate for nursing research (Nathaniel & Andrews, 2007; Schreiber & Stern, 2001) and aims to discover a main concern of participants and how they manage and resolve such concern (Glaser, 1978). GT was formulated by Glaser & Strauss (1967) and elaborated by Glaser (1978, 1998), Strauss and Corbin (1998), and others. The method elaborated by Glaser is often called classic grounded theory (CGT). Researchers need to choose not only what method to use but also what approach (Heath & Cowley, 2004), remodeling (Glaser & Holton, 2004) or even synthesis of approaches (Chen & Boore, 2009). The aim of postgraduate studies is to get a deeper understanding of both the subject and scientific methodology (Karolinska Institutet, 2007). A situation in which no expert is present to teach and guide in GT methodology is known as minus mentoring (Glaser, 1998, p. 5; Stern, 1994). Experience of such a situation is shared by many people over the world. One challenge with minus mentoring is that informed formative feedback, given during the process in order to enhance learning (Biggs & Tang, 2007), may be lacking. When my research education started, I did not know much about CGT. One of my supervisors had supervised an earlier thesis using a “grounded theory approach” (Baarnhielm, 2003, p. 47 ); the other two supervisors had no experience in using GT, though their attitude to the method was positive. In choosing the CGT method, my main concern was to perform good research while learning-by-doing. The aim of this article is to share experiences of learning and using CGT. Memos as well as methodological discussions in my thesis and articles have been used as the basis for this discussion. The various categories, presented in the text below, are further illustrated with examples from my experience. The examples are taken from the my thesis (Pergert, 2008) and the four studies included there, referred to throughout this article by their Roman numerals I – IV. Methodological Learning-by-Doing This refers to the capability to acquire methodological skills and understanding while using the method and doing research. Consequences of learning grounded theory by doing include challenges and lessons learned but also rewards. Challenges and lessons learned In this section, some challenges and lessons learned, from my experience in using GT and learning-by-doing, will be presented, including sampling-confusion, delimiting-disregarding, judging saturation and conceptual language-struggling. Sampling-confusion The initial decisions for sampling in GT are based on the general subject area (Glaser & Strauss, 1967, p. 45). This is similar to purposive sampling in the sense that it aims to include people who are knowledgeable about the subject being studied (Polit & Hungler, 1999). In GT, this initial sampling should be followed by theoretical sampling of comparative groups and literature....