The purpose of this study is to investigate the characteristics of students below level 2 on mathematical literacy assessment. The computerized basic mathematical literacy assessment and the spreadsheet integrated mathematical literacy intervention tasks were composed as a dynamic assessment system. Students worked on the tasks collaboratively. The number of relevant variables and degree of complexity for problem situations were increased sequent to scaffold students' learning progress. The issues included were; the validity of the computerized basic mathematical literacy assessment (CBMLA), the intervention effect, and the correlation of growth slopes between formative and objective assessments. The students below level 2 on CBMLA could read familiar situations or routine mathematical description of the problem. They were able to apply the formula provided by the item, and they could also use the basic statistics information from charts to solve the problem, but they could not identify the pattern of graph and numbers. They had some barriers to convert the text into mathematical equations. The slope of mathematical literacy of experimental group was significantly higher than the slop of control group. The experiment group students increased 35 points between two assessments, while the treatment group could explain about 6% growth variance. Based upon the results, some suggestions for further development and application of dynamic assessment on mathematical literacy are provided.