We have recently reviewed the way our staff are paid - since the arrival of our new treasurer. Previously they sumbitted a timesheet with their hours on.
Staff are now paid a salary for their contracted hours ie. 15 hours a week multiplied by 44 weeks(38 weeks of term plus 6 weeks holiday pay) divided by 52 weeks of the year. This way they get a regular income every month, rather than some months, like over the summer, getting a little bit of holiday pay or nothing at all.
They can claim any overtime - such as lunch club, toddler group, trips, report writing and training on an overtime form which has to be submitted by 21st of the month.
We've been doing this since April and so far no problems.
Their actual written contract is based on the Pre School Learning Alliance model.
Re the flexi time, our staff do sometimes occasionally arrive late, leave early, etc but as they get paid half an hour before and after the session for tidying up/putting away, this doesn't affect ratios. I know that they start work earlier than they are paid for most days - and often work later than they are paid for! So we, as a committee, don't have any issues with this.