Academic Core is a highly structured four-level program (A through D) developed by the National Institute for Direct Instruction (NIFDI) to teach students important science facts and information. The program ensures mastery of sophisticated information and includes a built-in reward system to motivate and reinforce students. Measurement, time, the solar system, rocks, body systems, and United States geography are just a few of the units included. It is intended for students in grades 2 and above. Each lesson is designed to be presented to the entire class but can also be presented to small groups, and should take approximately 20 minutes to teach.

Academic Core is primarily a verbal program directed by the teacher. The teacher presents lessons from a script, and students respond verbally. Once brought to verbal mastery, students respond to questions in writing. Many units include reference charts, maps, or displays. Most units stand alone; however, some units depend upon information from earlier ones. This overlap of information requires the teacher to either follow the exact sequence of each level or ensure students know the prerequisite information. The program includes evaluation materials to ensure students have mastered the material and rewards them as they progress.