Go slowly, and genuinely praise his efforts. Be gently persistent in working everyday - daily practice is essential . However, do not hurry or pressure your student. There may even be times when it's best to put lessons aside for awhile. Many things affect a child's receptiveness to learning, such as maturity, attention span, health, hyperactivity, etc.
Attention span can vary greatly with each child, and even from day to day with the same child.
Read all of the directions in each lesson before you begin, and always do these lessons in sequence. This is important because one skill builds upon another, and each practice reading reflects knowledge of all the letter sounds learned up to that point. At first, work only a few minutes a day. It is the habit of sitting together for a lesson that is important to establish - you will gradually find yourselves spending more time with these lessons. Success breeds confidence and enthusiasm on the student's part, and a desire to do more.