Date conversion 18.06.2017 Size 17.6 Kb.

Children on the Bunk Bed

 Scoring Guide/Rubric (a score should be awarded for each criterion below) Criteria (CCSS code) 0 points 1 Point 2 Point Use addition and subtraction within 20 to solve word problems involving situations of adding to, taking from, putting together, taking apart, and comparing, with unknowns in all positions. (1.OA.1) Student may or may not be able to determine unknown amount in problem, even with assistance. Student able to determine unknown amount in problem, with minor inaccuracies. Student able to determine unknown amount with accuracy. Uses objects, drawings, and equations with a symbol for the unknown number to represent the problem. (1.OA.1) Student may not be able to show their thinking using objects, drawings and equation with a symbol for the unknown number. Student may be able to represent thinking by using objects, or drawings, and may or may not be able to show equation with a symbol for the unknown number. Student able to represent thinking by using objects, drawings and equation with a symbol for the unknown number.
Teacher Note: You may also use this particular problem to assess Mathematical Practice #7 (Look for and Make Use of Structure) and #8 (Look for and express regularity in repeated reasoning). Do the students notice a pattern when doing this problem? After finding a couple of answers to this problem, did they use that information and generate other solutions?

Name Date

C

hildren on the Bunk Bed

Solve this problem.

Children sat on a bunk bed. Some

sat on the top bunk and some sat on the bottom bunk.

How many sat on the top bunk? How many sat on the bottom bunk?

Record as many different solutions to the problem as you can, using pictures, numbers or words.