Due to the developments (No s) in technology and the higher life standards, children (Paraphrase please) somehow are negatively affected, which leads to their unhealthy lifestyle. It is my belief that not only schools but also parents take responsibility for solving this problem. (Again, paraphrase the given passage and replace them with suitable lexical resources).
It is undeniable that children (could be substituted by: youngsters, the youth, the young generation, the juveniles et cetera)'s time at school and home are approximately equal. Children have to spend time from the morning to afternoon for school and the other part of a day to be at home, which leads to the spending time balance between two these places. In other words, children are certainly affected by the amount of activities at school and home at the similar time. Students stay with their teachers and friends to study and participate in class activities, and out of school time children is compulsory under-controlled of their parents with some activities at home.
=> The above passage only contains pure facts. This paragraph lacks reasoning and evidences in order to support your conclusion. Furthermore, from the fact that they spend time roughly equally at home and at school, we cannot deduce anything about their responsibilities. You should specify on the degree of influence the activities at school and at home on these children and emphasize on the causal link between those actions and juveniles' unhealthy lifestyles.
Further and even more importantly ("Furthermore" is enough, try to be concise), children are considerably influenced by various factors both at school and at home. Teacher and friends' lifestyles have a significant contribution to shaping children's lifestyles such as how effectively they communicate with peers or how they conduct teamwork with the others (This is merely an assumption, not a fact. You should back it up by reasoning: How can A be influenced by B ?). On the other side, whenever children live with their parents, they following parents' habits is the unavoidable thing. For instance, when a young child grows up with unhappy parents, who always get angry or use violence as a solution for problems, it gradually (gradually do not fits this sentence and you can eliminate it) leads them to growing into an aggressive person (plural) as same as the way of their parents. (ambiguous expression phrases) Moreover, it certainly affects to (no) children's studying when they use technology in limitless way to play computer games or chat with friends in social networks at their accommodation.
In summary, I once again restate my view that schools and parents have the same responsibility for the children's unhealthy lifestyle. Not only time spending is equal between school and home but also diverse points exists to influence children's lifestyles in these two places, therefore, the responsibility is shared for both of them.