The ABC philosophy asserts that curriculum is the key to helping students learn more and score higher. A Balanced Curriculum is defined by 10 to 20 time-bound units for each course. Units consist of two to five powerful activities (significant tasks) that everyone teaches and assesses. The model’s power resides in the assumption that the teachers/curriculum developers can describe significant tasks that will raise student achievement. The task is also aligned to appropriate standards and tests, ensuring that all students have equal access to an aligned curriculum. All course teachers teach and assess each of the significant tasks, a promise to next year's teachers that all students have similar prerequisite skills.