The best way of providing comprehensive, uniform and correct information about reproductive health in schools can be
Measures like introduction of sex education in schools provides right information to the young so as to discourage believing in myths and having misconceptions about sex-related aspects. It also provides a comprehensive way to understand all aspects through state designed and approved curriculum
All the practices like discussion with friends can also help but it may be subject to bias, limited knowledge and certain reservations. All information on internet may not be true and may lead to altered understanding and interpretations of the text, especially by different young students.
Arranging sessions annually may not be enough and may be subjected to reservations, inhibitions, absenteeism and non-coverage of essential facts and learnings.