I do support that the teacher should build a friendly relationship or bond with the "shy" student or student that is having learning difficulty. It is vital to identify his/her need -why is is the child shy? or what is his/her learning difficulty. Usage of kind and polite words is important to build trust with the child. Find extra time with her/him and spend time to talk to him/her and find out more what their interest is .The teacher should develop and show concerns with his/her parents by developing partnership so the parents are aware of their child's learning. So there is a sound understanding and discuss ways they could help from home. Moreover the teacher should be more sensitive during her/his teaching if she notices or has identified a child that is "shy" or having learning difficulty.
As a result when the friendly bond is developed and parents are aware too, although they may be "shy" or finding work difficult the teacher can include them by creating group work or pair work. Have peers to assist them during the group work. Allow discussion and provide tasks that the child can do and enjoy and feel included. They may be "shy" or finding the work difficult but build on their learning capacity the child already has to build their self esteem amongst others -their peers or small groups by giving the right support.