One of the characteristics of children with autism is their inability to understand the audible instructions properly. It is easier for them to understand commands visually. As a result, children with autism need adaptive media to understand their daily activities schedule. By employing a behavior modification research, this study aims to find the effectiveness of Wacker Daily Activity media in helping children with autism understands their daily activities schedule. This research used SSR or single subject research method. SSR makes research possible done on one subject. This research procedure was carried out through three stages, namely, baseline 1, intervention, and baseline 2. The results showed that in baseline step 1 (A1), it decreased from 2 to 3. This is because it is still in the initial condition. Meanwhile, the intervention stage (B) increased from 7 to 9, because it has been given Wacker Daily Activity or WDA media. Then, the baseline step 2 (A2) increased again 9 out of 12 sessions. It can be concluded that the use the Wacker Daily Activity media improves the children with autism understanding of their daily activity schedule.