Where does learn take place? Individual or Group

Coaches,

I have a question... Where do you think your players learn the most? From Individual periods or from Group periods? Explain your answers please... also what are your practice plans like?

I ask this because I'm trying to make my practice plans for the year and I prefer having more group time than individual time. I feel individual time should be spent teaching agilities, reads, keys, concepts, etc and that the group time will allow them to put it all together... see the big picture.

Here is an example of my practice plan... tell me what you think.

15 min. stretch/run
20 min. special teams
10 min. cag/pursuit drill
15 min. individual
5 min. water
10 min. blitz period/man
20 min. Inside/outside
25 min. Team script

Now the first couple of practices for 2-a-days, I do have 20 minutes individual but that is b/c of the numbers. JV, Freshman, and Varsity are all together.

Opinions, thoughts, concerns???

Thanks for the help.
JU