Two experiments were conducted in a junior-high special-education class of eight pupils in an inner-city school. In the first experiment, the teacher doubled the number of words used by the pupils in answering questions by altering the type of questions asked. In the second experiment, the number of words used by students and the percentage of answers given in complete sentences, increased from less than 5% to approximately 90% when the teacher instructed the pupils to answer in complete sentences and asked another pupil to answer using a sentence if the first one did not do so. In both experiments, a brief return to baseline conditions brought a return to low levels of verbal responding. An analysis of which pupils were called on by the teacher, teacher praise, and in the second experiment the types of questions asked, indicated that these variables were not responsible for the increases in verbal responding.

The effects of a parent tutoring her children in spelling were assessed. In two experiments, weekly spelling scores of two boys were recorded. Following a Baseline phase, the parent tutored her sons at home each week on their spelling words. In-school spelling scores increased for both boys. Reversal procedures and comparisons to the class means were used to show that the increases were due to the home tutoring procedures. In Experiment I, gradual decreases in the number of tutoring sessions for one boy resulted in the continuation of high spelling scores. Complete withdrawal of tutoring procedures for the second boy also resulted in the maintenance of the higher spelling scores.