Sayyed Mohammad Al-Musawi, Sayyed Mohammad al-Musawi is originally from Iraq and heads up the World Ahlul Bayt Islamic League in London. Other than being involved in various humanitarian projects, he frequently responds to... Answered 6 months ago

As far as your students are from general public who can use the knowledge in good way, and you do not know for sure that they will misuse it in unlawful ways, you are permitted to teach them and give them your skill. If you are sure that a specific group of people will use the skill in unlawful work, then you should refrain from helping them to do unlawful work.