You've come to the wrong place!
I don't think TEACCH has many admirers on this board. My DS used TEACCH 'lite' while at SS, using a structured workstation. He had various activities in coloured drawers which he completed in order, moving each activity into a 'completed' drawer once finished. He was taught to do this to get him doing some work independently. The workstation was set up in a shielded corner of the room with plain white walls, no distractions. It worked to a small extent, he would complete the activities but once in MS, it was quickly dropped by the school who preferred to keep him working with the other NT DC.
He also used a detailed visual vertical timetable, of PECs type Velcro cards which could be removed from the timetable once each activity was completed. He loved this and it helped him a lot with transitions. He would voluntarily use it to check what was happening often throughout the day. His MS school introduced a class timetable that all the NT reception DC also found useful. My DS had to have every detail on it initially, eg go to toilet, wash hands, line up for snack, get snack, sit on carpet, eat snack, whereas the NT DC were happy with 'toilet' then 'snack time.'
Before he used either of these aids he was introduced to PECS which was also very beneficial to him. It kickstarted his communication and led to much better speech.
I think a lot of posters on this board would say that ABA (Applied Behavioural Analysis) is a much better methodology to use with DC with ASD, but it's not popular with LAs.