Dolch (High Frequency) words
My upcoming book teaches phonics along with 8 (Dolch words) called sight words to be memorised in each lesson.
The Dolch words comprise about 50 to 70 percent of the words in most books. These are High-Frequency words such as on, the, with, here, to, no, at, etc.
In order to achieve reading fluency it is best to get your student to memorise these words by rote memory.
Once a child knows this list of words, it makes reading much easier because the child can then focus his attention on the remaining words.