This lesson plan was written to foster the development of estimation skills at the third grade level. The lesson is based on the book "Great Estimations" by Bruce Goldstone. Students read the story together and then use strategies presented in the story to solve an estimation challenge. The lesson plan is aligned with Common Core standards, explicitly addresses the acquisition of academic language, and includes color-photo task cards as the basis for a highly engaging math lesson. The task cards are designed to honor a range of developmental ability levels (below level, on level, advanced).