By the end of the school year, all students should be able to:
■ Read and write whole numbers through 10,000.
■ Round numbers to the nearest 10 (for example, round 878 to 880) and to the nearest 100 (for example, round 446 to 400).
■ Understand that a decimal is a part of a whole. For example, Sarah has two dimes and two pennies. It can be represented as $0.22. Recognize benchmark fractions (halves, thirds, fourths, fifths, sixths, and tenths), and identify equivalent fractions (for example, 1/2 = 2/4) using visual models.
■ Know the names of polygons, such as triangles, pentagons, and octagons. Know that the names of polygons are related to the number of sides and angles. For example, a triangle has three sides and three angles.
■ Find the perimeter of a polygon by adding the lengths of its sides.
■ Classify angles as acute (less than 90 degrees), obtuse (greater than 90 degrees), right (exactly 90 degrees), and straight (180 degrees).
■ Use a ruler to measure to the nearest whole inch, half inch, quarter inch, foot, yard, centimeter, and meter.
■ Use data to develop and make predictions.
■ Use observations, surveys, and experiments to collect and record data. Show the data using tables, bar graphs, and pictographs.
■ Figure out whether a mathematical statement is true or false and explain why.
Learning at Home
Encourage your child to spot geometric shapes in buildings or familiar scenes. For example, find acute, obtuse, and right angles in a photo of the Brooklyn Bridge; the quadrilateral on a baseball field; or different kinds of polygons on street signs.
Ask your child to make a chart of the high and low temperatures reported in New York City for a month. What patterns can be seen? Talk about how the numbers might change next week or next month.
Start a spare change jar and invite everyone to contribute to a family goal. Once a week, ask your child to add up the coins and estimate when you will reach the goal.
Find a family recipe that serves four people. Ask your child to calculate how much of each ingredient it would take to serve eight people and how much to serve two people.