As a Teaching Assistant I would have discussions with the teacher to discuss the lesson plan and the teacher’s expectations and outcome for the lesson.
It would be my responsibility to assist the teacher in completing risk assessments before the lesson begins and to read all the instructions on the safe use of the equipment. I would ensure that all the instruments are ready for the lesson, having checked they are in good repair and unlikely to cause injury i.e.: splinters from wooden instruments, sharp edges. If any of the instruments are electronic I must check for current safety test stickers and check all cables and plugs for breaks and repairs, if battery operated, check that the batteries are working and have not blown. Any percussion instruments with mouth pieces must be hygienically cleaned and maintained. Any damaged resources/instruments must be stored safely out of the way of the children and reported to the appropriate person.
I would ensure there are enough musical instruments for each child, or divide into groups and take it in turns. It may be possible to have the children make some of their own percussion instruments prior to the lesson i.e.: Maracas.
Prior to the lesson I would ensure that there were enough copies of the learning material, i.e.: song sheets, for each pupil or group, they are undamaged and are appropriate for the age of the children and readable.
As a Teaching Assistant I may be responsible for preparing the room and must think about the space needed for the lesson and seating arrangements, considering the pupils who are going to be involved in the lesson i.e.: are there any children who are unable to sit on the floor and require a chair due to physical disability or restricted movement. There may be children who, due to mental or physical disability are in wheelchairs and require good access to the area being used, double doors, wheelchair ramps, additional space to manoeuvre their chair into the arranged seating plan.