I have received much like-minded support, and assurance just by this post. Thus I learnt more other ways too!
The one thing that I am very confident in this fun, engaging method is that > words retention works than words recalling by the traditional method.
His learning becomes positive and he revise on his own in the morning, on spelling day. What more do I ask for, he scores perfect score in my heart even though he may not get them right on paper in the classroom.