Jonathan's new learning target was to determine the unknown whole number in addition and subtraction equations relating 3 whole numbers. We began the session with a hands-on activity taking away counters, and Jonathan had to figure out the number of counters removed. He then gained practice finding the unknown number by working on problems in which he was tasked with finding the missing number in equations by applying strategies previously acquired. Jonathan did well on this skill and demonstrates a good ability to reason abstractly and quantitatively.