That's difficult to answer, since all accommodations are based on an individual child's needs and need to take into account all the educational environments in a typical school day.
Some common accomodations might include:
short breaks during instruction;
small group instruction or individual instruction for specific subjects;
access to sensory tools (fidgits, swing, weighted vest, seating);
visual schedule;
shortened directions and/or repeated directions paired with visuals
assistive technology devices as determined by AT evaluations;
adapted keyboard;
one-click mouse;
specialized software
Hope this helps answer your question!