Inclusion Criteria:  Istanbul University-Cerrahpaşa Florence Nightingale Faculty of Nursing 1st year AGNO score not to be below 1.8 To be registered in the HMSR 2016 Surgical Diseases Nursing course in the spring semester of the 2019-2020 academic year Not having received peer and self-assessment training before Having no previous stoma care training Not working as a part-time or full-time nurse  Exclusion Criteria:  To have training in stoma care Having received self- and peer-assessment training Working as a part-time or full-time nurse Having an AGNO score below 1.8