Assess students' ability to solve two-step addition and subtraction word problems within 20 using drawings or manipulatives. Problems should require planning and performing two sequential operations (add then subtract or subtract then add), representing each step with drawings or counters, recording intermediate totals, and explaining reasoning. Include 6–8 age-appropriate contexts (objects, snacks, classroom items) with some missing-addend and unknown-start formats; score final answer accuracy, clarity of representation, and explanation of steps.