This chart has two sides.
Firstly the TRACE OVER THE LETTERS side. The act of overwriting the correct formation of the 26 lower case and capital letters of the alphabet allows children to practise their formation and fluency.
Secondly the TRACE OVER THE LETTERS AND GCAs side.
The act of overwriting the correct grapheme for a word, helps the learner recall the spelling choice and recognise it when reading. To practise the segmentation and blending of phonemes in words, overwrite the relevant graphemes in the correct phoneme-boxes.