The third 100 Fry words plus the first 100 and second 100 words are called Fry 300, which are the essential words of the Fry sight list. The third 100 Fry words are the right content for children who finish Dolch words and turn to more extensive sight vocabulary. In this year, the original Dolch students have to switch to Fry words sooner or later. In grade 1 and grade 2, some students stick to Dolch words.
Comparing the first 300 Fry words (also called Fry 300) with Dolch words will get a high ratio overlapping. So, the 3rd grade is the particular year to study Fry words. The Dolch sight words list focuses on reading from kindergarten to 2nd grade, and the Fry sight words list focuses on reading from 3rd to 9th grade.