1. Do step to step progression(go step by step to let them better understand)
2. Go slower if you see your students not understanding.
3. Make them practice at home what they need to work on .
4. Ask them what they understand and what they don't understand and discuss
5. Make sure they get it completely. Test them with a certain problem and if they can't do it, show them some more and do step 3.
Hope this helps!
