Letters and Sounds recommend introducing 4 phonemes a week, but you suggest covering 5 or 6. Which is best?
The number of sounds a school introduces each week really depends on the school. Like Fun with Phonics, Letters and Sounds originally recommended 5 or 6 phonemes a week, but the final publication brought it down to 4. If a school decides to teach 4 phonemes a week, this is fine, and makes no difference to Fun with Phonics as the resources would be used in exactly the same way.
