Popcorn words are the high-frequency words that we learn to read in kindergarten.  We call them popcorn words because they pop-up so often in our reading.

September:  a, the, Bible, can, at

October: I, am, like, is

November:  big, in

December: Jesus, but, it

January:  look, see, my, we, God

February:  little, have, do, not, what

March:  one, two, three, red, yellow, blue

April:  green, purple, here, to, up, get, where, and

May:  orange, pink, white, black, you, that, go