Answers are found by finding the higher of two addends on the red column and counting over as many squares as indicated by the second addend in the problem being solved. Problems can be worked using this and checked with Chart 1 or 2. When adding an odd number and an even numbers, you won't end up in the same box. If you cannot jump into the same box, you must jump into the middle or into the box to the left of the bottom number. Same as Chart 3, except that the sums are printed on separate white wooden squares and are placed on the proper blank squares by the child.
Work is checked by the teacher.
Working with a friend to learn the addition facts. Carefully drawing the index fingers together to find the answer. Checking answers against the control chart. Getting problems all correct. Jumping the finger to find the answer.