OTs are required to complete a bachelor or master's degree level education and must pass an exam to receive their license to practice. OTAs are required to complete an associate level of education and must also pass an exam to receive their license to practice. Stronger emphasis on OT theory and evaluation is included in the OT's education where the OTA's educational emphasis is on activity analysis and treatment techniques. Generally, an OTA can provide the same level of occupational therapy treatment as an OT but must always be directly supervised by an OT. An OTA can contribute to evaluation, treatment and report writing.