HR-->Staff Details-->Teacher Management-->Select Subject Teacher option-->select the Board-->click on Assign Subject Teacher-->select the staff type,
search by,and enter staff name-->click on search-->click on Subject Teacher-->click on + icon-->select board,class,subject-->clock on get-->select the
check box against the respective section-->click on Assign.
To assign a new class to the subject teacher, follow the path given:
SIS-->Timetable-->Teacher Management-->Select Subject Teacher option-->select the Board-->click on Assign Subject Teacher-->select the staff type,
search by,and enter staff name-->click on search-->click on Subject Teacher-->click on + icon-->select board,class,subject-->clock on get-->select the
check box against the respective section-->click on Assign.