Quarter 2

Unit 2 

This unit's main focus is adding and subtracting within a 1,000 using strategies and algorithms based on place value, properties of operations and/or the relationship between addition and subtraction. Students will round to the nearest 10 and 100s. Students will also be measuring and estimating liquid volumes and masses of objects.

Students will also learn how to tell time to the nearest minute. (Second grade expectations are that students know time to the 5 minutes). Elapsed time will also be introduced in this unit. Standards do not need to be mastered by the end of this unit. Standards will be revisited throughout the year.

Vocabulary:

Place value, Rounding, Volume, Mass, Grams, Kilograms, Liters

By the end of the unit, students should be able to...

• Justify your answer using various estimation strategies.
• Round a whole number to the nearest 10.
• Round a whole number to the nearest 100.
• Fluently add and subtract within 1,000.
• Choose a strategy for adding and subtracting within 1,000.
• Solve addition and subtraction problems involving elapsed time.
• Estimate and measure liquid volumes and masses of objects using metric units (grams, kilograms, meters, milliliters) 
• Measure weight and liquid volumes in metric units (grams, kilograms, meters, milliliters)
• Read an analog clock face to the minute.
• Write time to the minute.
• Compare an analog clock with a number line diagram.
• Use a number line diagram to add and subtract time intervals in minutes.

Unit 3

This unit's main focus is multiplication and division and solving problems with units 0,1,6-9, and multiples of 10. The students will know the relationship between multiplication and division. They will be able to use manipulatives and pictures to solve a variety of problems. Knowing their facts fluently is an ongoing skill. Story problems are used for multiplication and division throughout the unit.

Vocabulary:

 Array, Associative Property, Commutative Property, Distributive Property, Dividend, Divisor, Factor, Product, Quotient.

By the end of this unit, students should be able to...

• Interpret products of whole numbers as a total number of objects in a number of groups.
• Explain what division means and how it relates to equal shares.
• Interpret quotients as the number of shares or the number of groups when a set of objects is divided equally.
• Solve word problems in situations involving equal groups, arrays, and measurement quantities.
• Represent a word problem using a picture, an equation with a symbol for the unknown number, or in other ways.
• Determine which operation (multiplication or division) is needed to determine the unknown number.
• Solve to find the unknown whole number in a multiplication or division equation.
• Explain how the properties of operations work.
• Apply properties of operations as strategies to multiply and divide.
• Use multiplication to solve division problems.
• Explain how multiplication and division are related operations.