50 480 160 2 The student solves zero The student solves one The student solves The student correctly out of three parts out of three parts two out of three parts models the arrow way correctly. correctly. correctly. and solves to find: 2.NBT.7 230, 240, 390, 240 2.NBT.8 -300, +20, 280 958, 558, 958 The student solves two 3 The student solves one The student solves The student correctly out of four parts out of four parts three out of four parts uses place value chips correctly. correctly. correctly. and writes a related 2.NBT.7 subtraction method to solve: 2.NBT.9 892 812 The student correctly uses place value chips and writes a related addition method to solve: 388 237 4 The student answers The student answers The student answers The student correctly one out of five parts two to three out of five four out of five parts shows a strategy to solve correctly. parts correctly. correctly. (strategies may vary): 2.NBT.7 194 248 200 770 726 5 The student answers The student answers The student gives a The student correctly: zero out of two parts one out of two parts partial explanation of Explains that Martha correctly. correctly. Martha’s error and made an error in the 2.NBT.7 correctly models an hundreds place 2.NBT.9 alternative strategy to while subtracting. solve, or the student Models an gives an explanation
50 480 160 2 2.NBT.7 2.NBT.8 The student solves zero out of three parts correctly. The student solves one out of three parts correctly. The student solves two out of three parts correctly. The student correctly models the arrow way and solves to find: 230, 240, 390, 240 -300, +20, 280 958, 558, 958 3 2.NBT.7 2.NBT.9 The student solves one out of four parts correctly. The student solves two out of four parts correctly. The student solves three out of four parts correctly. The student correctly uses place value chips and writes a related subtraction method to solve: 892 812 The student correctly uses place value chips and writes a related addition method to solve: 388 237 4 2.NBT.7 The student answers one out of five parts correctly. The student answers two to three out of five parts correctly. The student answers four out of five parts correctly. The student correctly shows a strategy to solve (strategies may vary): 194 248 200 770 726 5 2.NBT.7 2.NBT.9 The student answers zero out of two parts correctly. The student answers one out of two parts correctly. The student gives a partial explanation of Martha’s error and correctly models an alternative strategy to solve, or the student gives an explanation The student correctly: Explains that Martha made an error in the hundreds place while subtracting. Models an