Content Area: Math

 

Index: 4.1B Grade 2 CPI 5

 

Standard: 4.1 - Number and Numerical Operations

 

Strand: B - Numerical Operations

 

Cumulative Progress Indicator: 5 - The student will select pencil-and-paper, mental math, or a calculator as the appropriate computational method in a given situation depending on the context and numbers.

 

Grade: 2

 

Sample Activities:

 

·        The daily calendar routine provides the students with many opportunities for computation. Questions like these arise almost every day: There are 27 children in our class. Twenty-four are here today. How many are absent? Fourteen are buying lunch; how many brought their lunch? or It's now 9:12. How long until we go to gym at 10:30? The students are encouraged to choose a computation method with which they feel comfortable; they are frequently asked why they chose their method and whether it was important to get an exact answer. Different solutions are acknowledged and praised.

 

·        Students regularly have human vs. calculator races. Given a list of addition and subtraction basic facts, one student uses mental math strategies and another uses a calculator. They quickly come to realize that the human has the advantage.

 

·        Students regularly answer multiple choice questions like these with their best guesses of the most reasonable answer: A regular school bus can hold: 20 people, 60 people, 120 people? The classroom is: 5 feet high, 7 feet high, 10 feet high?

 

·        As part of an assessment, students tell how they would solve a particular problem and why. They might circle a picture of a calculator, a head (for mental math), or paper-and-pencil for each problem.