Competently delivered ABA intervention can help learners with autism make meaningful changes in many areas. However, changes do not typically occur quickly. Rather, most learners require intensive and ongoing instruction that builds on their step-by-step progress. Moreover, the rate of progress – like the goals of intervention – varies considerably from person to person depending on age, level of functioning, family goals and other factors. Some learners do acquire skills quickly but typically this rapid progress happens in just one or two particular skill areas such as reading, while much more instruction and practice is needed to master other skill areas such as interacting with peers.