Children can recite number words before they understand that each object must be counted once. Picture worksheets are most valuable when adults encourage an organised counting strategy rather than guessing from the size of a group.
Touch or mark each object
Ask the child to point, move a finger or make a tiny mark as each item is counted. This keeps the spoken number connected to one object.
Rearrange mentally
For scattered pictures, count from left to right or divide the area into sections. An organised scan prevents missed and repeated objects.
Ask what the last number means
After counting, ask how many there are altogether. The answer should be the final number said, helping children understand cardinality.