I agree to start off with acceleration development right now, but I do not recommend flying sprints this early if she's gearing up for next year. The reason being, you need proper acceleration qualities in place before you can truly run at your MaxV and/or develop an even higher level of MaxV. I say stick with 10's and 20's for now, moving out to 20's and 30's in the fall and throw in either stairs or hills one day a week as well (also considered acceleration development). The hills will help you with power output and knee drive (essential to sprinting) and the stairs will increase turnover and coordination. Don't forget tempo work as well.
Monday – Acc. Dev. (10's and 20's)
Tuesday – Tempo (about 1000-1200m)
Wednesday – Off or Active Recovery (another game of frisbee?)
Thursday – Hills OR Stairs (you should switch by mesocycle)
Friday – Tempo
Saturday – Off or Active Recovery
Sunday – Off
Just my suggestions. 😀 Good luck, the record is yours!