Brief Self-compassion Program will be held in a face-to-face school environment for the high school students in the experimental group. The MBTAP was carried out face-to-face in the classroom for the high school students in the intervention group. The goal of the program was to improve high school students' mindfulness levels, and decrease internet and smartphone additions' levels. This program was developed based on the concepts of mindfulness. The MBTAP was created in a certain flow based on the awekening to mindfulness (2 sessions), breath, body and mind (2 sessions), mindfulness and stress (2 sessions) and power of the compassion. There are 8 sessions lasting four weeks in the program and the frequency of sessions is 2 sessions per week and each session lasts approximately 50 minutes. The training program will be applied to 64 high school students in the experimental group.

There will be no training or intervention.

The MBTAP was carried out face-to-face in the classroom for the high school students in the intervention group. The goal of the program was to improve high school students' mindfulness levels, and decrease internet and smartphone additions' levels. This program was developed based on the concepts of mindfulness. The MBTAP was created in a certain flow based on the awekening to mindfulness (2 sessions), breath, body and mind (2 sessions), mindfulness and stress (2 sessions) and power of the compassion. There are 8 sessions lasting four weeks in the program and the frequency of sessions is 2 sessions per week and each session lasts approximately 50 minutes.

The MAAS consists of 15 items and is 6-point Likert type (almost always (1), most of the time (2), sometimes (3), rarely (4), very rarely (5), almost never (6)). The MAAS, which measures the general tendency to be aware of and attentive to moment-to-moment experiences in daily life, has a single-factor structure and no reverse-coded questions. High scores on the scale indicate high levels of mindfulness. The Cronbach's alpha reliability coefficient was determined to be 0.80

The YIAT-SF consists of 12 items, one factor and is 5-point Likert type. Scores on the form range from 12 (lowest) to 60 (highest) and a high score on the test indicates greater levels of internet addiction. The Cronbach's alpha reliability coefficient was determined to be 0.86.