Then on Day 2, the student should repeat Lesson 1 and complete Lesson 2. Then on Day 3, the student should repeat Lesson 2 and then complete Lesson 3. Each lesson is cumulative, in that it re-uses letters from the prior lessons. Therefore, when you are on Lesson 3, there should be no need to repeat Lesson 1, because repeating Lesson 2 will re-emphasize everything you learned in Lesson 1. On the other hand - there is no problem repeating a lesson 10 times if that's what it takes for the student to learn it.
Repetition is the key to learning.
Each letter in each word will have been introduced and explained before appearing in a word. In the reading lessons, the student should always try to pronounce the word himself before clicking on the mouse-button to speak and reveal the pronunciation. The vocabulary in Reading Lessons 1-13 were chosen more for teaching the phonetics rather than for teaching vocabulary. At this stage, fluency in just the phonetical reading skills should be stressed. These are words which a Jewish student might already be familiar.