How to plan out years "term time working request - anyone good with letters?

[MrsHarrisonFord]

My boss has verbally agreed to my request for term time working (I know I am so grateful) I have done a a letter request and need to demonstate week by week how my hours would work - for thenest school year.
I started off in letter but its a mess then I went to pages of outlook - but too long anyone got any ideas on how i display this? so my manager doesnt have too hard a fight when with his boss? as I really need this to work.

anyone got any good ideas for me as am rubbish at this formal stuff.

thanks

could you not add a table?

column one - date period
column two - hours to be achieved in that period
column three - on leave and state whether paid or unpaid.

am thinking that each school half term = one date period.