Jun 6, 2016 - Enjoy the videos and music you love, upload original content, and share it all with friends, family, and the world on YouTube. ... <看更多>

Jun 6, 2016 - Enjoy the videos and music you love, upload original content, and share it all with friends, family, and the world on YouTube. ... <看更多>

The relationship of the letters in the alphabet to the sounds they produce is a key component in learning to read. Teaching letter-sound relationships... ... <看更多>