Never do anything to build resentment to learning. Next, determine the learner's ability level through using tests. Determine what problems the learner is having trouble with or needs to know. Use the Tips and Tricks sections for guidance. If you're just starting out or don't know what's wrong, I strongly suggest focusing maximum attention on helping your learner master addition.
Addition is one of the cornerstones of math.
Strive to have the learner add the numbers 1-9 automatically. Then, move on to subtraction and teach it as an addition with a missing part. Multiplication mastery is a must. Begin to teach multiplications as additions then strive to have the learner multiply the numbers 1-9 automatically. Some people may argue, but mastery of multiplication builds the confidence needed to pursue higher level math operations.