There is a tendency for Taiwanese elementary school students to reinforce their English in a cram school after regular school hours. However, there are still some students who constantly fail cram school classes. For this reason, the selected cram school set up a supplementary program to have these students gathered for an intensive training after regular English programs, which is what we called a remedial program. The aim of this article is to introduce a developmental approach to integrating remedial program in the process. The teaching concepts have also illustrated by investigating and observing a class in a selected cram school. In addition, how this program worked for underachieving students is explained in detail. The results showed this remedial program was significantly effective in assisting students in improving their English abilities. All students met the intended goal of the program and six students obtained growth with scores above 70%. It provided a model of the remedial program for underachieving students in cram schools or language schools in Taiwan or any countries learning English as a foreign language.