When you first begin practical work you must concentrate on achieving perfect insertions that are painless. As well as causing pain to the client, an incorrect insertion results in the hair not being treated properly and will probably allow it to grow back just as strongly as before. Perfect insertions take a lot of practice and you should be prepared for this. You will be required firstly to practice your insertions without using current. As this technique gets faster and more accurate you will then be asked to add current. You will probably start insertions on fellow students or colleagues. Some students will practise on themselves. From there you will progress to insertions with current on ‘models’.