Estimation resources

Students estimate (and explain how) the area of two islands on a grid.

Students estimate the height and length of various items around their school.

This practical task requires you to estimate the dimensions of a room, then check with a metre ruler and calculate the volume of the room.

In this practical task, students estimate how many multi-link blocks equal the length of two common classroom items. They then check their estimate with the blocks, then measure with a ruler.

This task requires students to show how to estimate numbers of items in some multiplication problems using any acceptable estimation strategy.

Students explain multiplication estimation methods used to solve word problems.

Students estimate the sum of a number of fractions.

This task requires students to estimate some addition problems using any appropriate method.

Students write down an explanation of how the front-end estimation strategy works in addition problems to give information on their understanding of the strategy.

In this task students decide which people are estimating and which are not, and explain their reasoning.

Students estimate an addition problem, share their methods, discuss the rounding method, and then do more problems using rounding.

Students use estimation strategies to calculate the number of vegetables they can buy with given amounts of money.

Students use rounding to estimate totals then discuss this as a method of estimation.

This task requires students to estimate some addition problems using any appropriate method.

This task requires students to estimate some addition problems using any appropriate method.

Students to show how they estimate in some addition problems.

Students estimate an addition problem, share their methods, discuss the averaging method, and then do more problems using averaging.

Students discuss making an interval estimate in multiplication problems (i.e., getting a lower and an upper limit for the actual answer using the front-end and rounding-up estimation methods). They then use this method on two problems.

Students estimate a multiplication problem, share their methods, discuss the rounding method, and then do more estimation problems using rounding.

Students estimate a multiplication problem, share their methods, discuss the front-end method, and then do more problems using front-end.

Students estimate an addition problem, share their methods, discuss the front-end method and then do more problems using front-end.

In this task students decide which people are estimating and which are not, and explain their reasoning.

Students estimate an addition problem, share their methods, discuss grouping nice numbers, and then do a problem using this method, then design a question showing how it uses the method.

This practical task involves students making estimates of sets of items and demonstrating their method(s) of estimation.

In this practical task, students are to estimate the cost of meals ordered from a menu. The teacher reads out the meals and students show the steps in their estimations.