I found these great Activity Trays at Dollar Tree to use for sorting activities. They come in a few colors for your different grades/ groups. This activity comes with four sorting cards that go in the bottom of the trays; one in each quadrant. Then students use the sort cards to decide if the picture makes a long I, Long O, Long U, or not (“none” card). The sort activity comes with 54 sorting picture cards and four base sort letter cards, plus a word list that corresponds with the picture cards. Look for other sorting activities for these trays at Garden of Thinkers at Teachers Pay Teachers!