After she learnt the character 山 shan (" mountain "), I told her that adding an extra shan would make 出 chu (" go out"); when she had learnt 刀 dao (" knife ") I taught her 力 li (" strength"); when she understood 石 shi (" stone "), she could also read 右 you (" right").
教懂了山字，順便告訴她如多一個山變成出；刀字會了再教她力字；懂了石字後她也會「右」字。