bigSlice := []interface{}{"a", "b", "c", ".... so on"}
splitted := slicey.Splitl(bigSlice, 13)

c := make(chan bool)
for _, child := range splitted {
	// len(splitted) goroutine
	go DoTheJob(child, c)
}

var chans [len(splitted)]bool
for i := range chans {
   chans[i] = <- c
}