Mathematical Processes 
Work meets standard of excellence 
Work meets standard of proficiency 
Work meets acceptable standard 
Work does not yet meet acceptable standard 
Problem Solving 
The student chooses efficient and
effective strategies when applying addition and subtraction skills to solve the problem
The student shows flexibility and insight when solving the problem, adapting if necessary

The student chooses workable and reasonable strategies when applying addition and subtraction skills to solve the problem
The student shows thoughtfulness when solving the problem 
The student chooses partially appropriate and workable strategies when applying addition and subtraction skills to solve the problem
The student shows understanding when solving the problem 
The student chooses inappropriate and/or unworkable strategies when applying addition and subtraction skills to solve the problem
The student attempts to solve problem 
Reasoning 
The student often draws out insightful and logical conclusions and recognizes inappropriately drawn conclusions without prompting 
The student in many situations, draws out logical conclusions and recognizes inappropriately drawn conclusions when prompted 
The student sometimes draws out simple, logical conclusions and sometimes recognizes inappropriately drawn conclusions when prompted 
The student rarely draws conclusions from a mathematical situation and usually does not recognize inappropriately drawn conclusions 
Communication 
The student uses effective and specific mathematical language, symbols, and conventions to enhance communication about adding and subtracting twodigit numbers 
The student uses appropriate and correct mathematical language, symbols, and conventions to support communication about adding and subtracting twodigit numbers 
The student uses mathematical language, symbols, and conventions to partially support communication about adding and subtracting twodigit numbers 
The student uses mathematical and nonmathematical language and conventions
incorrectly and/or inconsistently, which interferes with communication about adding and subtracting twodigit numbers 