A sequential procedure for teaching addition skills to trainable retarded students.
D000124:Achievement; D000293:Adolescent; D000328:Adult; D001521:Behavior Therapy; D004495:Education of Persons with Intellectual Disabilities; D006801:Humans; D008607:Intellectual Disability / Q000628:therapy; D008433:Mathematics; D011340:Problem Solving; D013647:Task Performance and Analysis; D013663:Teaching