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Students calculate an exact square root and estimate approximate square roots by finding the length of the square flower bed of a given area, and give an explanation for their answers.

Students use a plan of a garage with a scale to calculate the actual length and width of the garage and a workbench inside it.

Students explain subtraction estimation methods used to solve a word problem.

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

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

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.

Students estimate and explain how they estimated their answer for two number problems: one involving multiplication; and the other division.

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.

Students estimate a division problem, share their methods, discuss the nice numbers and factors method, and then do more problems using nice numbers and factors.

Students estimate a subtraction problem, share their methods, discuss the rounding one number method, and then do more problems by rounding one number.

Students select the best estimate for division and multiplication problems involving stamps, money, and baskets of pinecones.

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

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

Students read scales from pictures of everyday measuring equipment.

Students read scales from pictures of everyday measuring equipment.

Students read scales from pictures of everyday measuring equipment.

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

Students decide which children are estimating and which are not, and explain their reasoning.

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

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

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

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

Students estimate the sum of a number of fractions.

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.

In this practical task, students estimate, and then measure, the weight of two objects using a number of multi-link cubes, a balance scale and weights.