This research is an experimental study which is intended to find out the effectiveness of Tier-ii of Three Tiered Approach in teaching mathematics. The method adopted here is pretest post test control group. 50 selected students have been in the school’s response to intervention program and identified in Tier I, but needed additional intervention and support in Tier II. Tier II is a more intense, small group intervention for these struggling students. Each student in the study received an additional 45 minutes each day of mathematics instruction for two weeks , concentrating on basic maths skills ( addition ,subtraction,multiplication and division ) and problem solving skill . Each student was screened at the beginning and end of the program to determine their growth rate.The screening was done with the help of curriculum based measurement test.The result shows that Tier ii of Three Tiered Approach is very helpful for at-risk students.