Here's how i teach N phonics and alphabets. N is to match each picture to the correct alphabet/sound that the picture/word represents.
At the same time, i get him to match the words to the correct picture. This is to reinforced what he was learnt.
Right now, he doesn't seem to understand the aim of the game. He knows the sound of each letters but he does not seem to know the relation of each picture to the alphabet. Nonetheless, i believe with more practise he'd be able to get it one day.