Tele-nursing will be applied to adolescents in this group for 24 weeks. Weekly meeting and blood glucose monitoring will be done. The HbA1c value will be checked and the scales will be filled by meeting 3 times in total with 3 months intervals.

This group will be given face-to-face training only in the first encounter. During the research, no interviews will be provided through tele nursing. Only at the 3rd and 6th months will be interviewed to measure the HbA1c value and to fill the scales.

In the light of up-to-date information, "Type I Diabetes Education Guide" was created. With this guide, both face-to-face and tele-nursing training will be provided. Both working groups will receive training before starting research. The intervention group will continue their weekly training throughout the study.

HbA1c values were recorded before starting the study to determine the level of metabolic control. The HbA1c values will be followed up in the 3rd and 6th months of the research. When the adolescents go to the hospital for a routine control every 3 months, the HbA1c value will be checked from the blood values and the researcher will obtain it from the records.

"Diabetes Self-Efficacy Scale in Adolescents with Type 1 Diabetes" was used to measure self-efficacy in diabetes management in adolescents aged 12-18 years with Type 1 Diabetes. Scale; medical treatment and nutrition, nutrition and insulin dose adjustment, being able to tell about diabetes, being honest with oneself and others (Ozturk, Ayar & Bektas, 2016). Participants will be asked to fill in the "Diabetes Self-Efficacy Scale in Adolescents with Type 1 Diabetes" scale to determine their self-efficacy levels in the 3rd and 6th months of the research.

"Quality of Life Scale for Children Adolescent Form (Kiddo-KINDL)" was used to determine the level of quality of life of adolescents. The scale form consists of 30 items and dimensions of physical well-being, mental well-being, self-esteem, family, friends, school, and illness (Eser et al., 2004). In the 3rd and 6th months of the study, participants will be asked to fill in the "Quality of Life Scale for Children Adolescent Form" scale to determine their quality of life.

The scale is a self-report scale used in the evaluation of childhood anxiety disorders. The scale consists of 41 items and sub-dimensions of Panic Disorder/Somatic Disorder, Generalized Anxiety Disorder, Separation Anxiety, Social Anxiety, and School Fear. A cut-off value of 25 and above is accepted as a warning for anxiety disorder. An increase in the total score obtained from the scale means that the level of anxiety also increases (Cakmakcı, 2004). Participants will be asked to fill in the "Childhood Anxiety Screening Scale" scale to determine their anxiety levels in the 3rd and 6th months of the study.