Realize these students work better with no distractions. Move them away from windows and doors to do their lessons. Separate them from other distracting children or displays.
Involve motion in your teaching for them. An ADHD child is always in motion. This does not mean they aren't paying attention. Give them something to do, such as play dough, while you are teaching.
Teach the hard subjects first. Make the lessons as easy and as short as possible. Teaching the hard concepts at the beginning helps the ADHD child be at their best for these.
Follow a routine in which the child is familiar. Start your lessons at the same time in the same way. This gives your ADHD child the structure and predictability that will help them learn.
Give them frequent breaks. Teaching them in smaller pockets of time will enable the child to take in the information.
Use visual aids in your teaching. ADHD children are often visual, hands-on learners. Get them involved and in motion and they will retain more of what they are taught.