Hmmm, beautiful poem . . . trying to remember . . . *google!
Quoted from this site:
http://www.cs.rice.edu/~ssiyer/minstrels/poems/63.html
Quote:
1. Wordsworth made use of the description in his sister's diary, as well as
of his memory of the daffodils in Gowbarrow Park, by Ullswater. Cf. Dorothy
Wordsworth's Journal, April 15, 1802: "I never saw daffodils so beautiful.
They grew among the mossy stones . . .; some rested their heads upon these
stones, as on a pillow for weariness; and the rest tossed and reeled and
danced, and seemed as if they verily laughed with the wind, that blew upon
them over the lake; they looked so gay, ever glancing, ever changing."
Thus, in fact, your teacher ought to check his/her sources. Good luck!