Refer to the Addition Strategies Chart from Lesson 2 as you
remind students that they have an extensive list of addition
strategies. They can also add the three paper-and-pencil methods,
expanded form, all-partials, and compact. Display and direct
students to the Addition Strategies Menu page
in the Student Activity Book. See Figure 9 and the Content Note.
Ask students to compare the menu to the strategies they collected
on the chart.
- Are there strategies on the menu that were not on our chart?
- Are there any strategies missing that you would like to add?
- Which of these can you do in your head? (Finding Friendly Numbers or Counting On)
- How can you see that they are mental math strategies on the menu? (They are under the mental math column and they are marked with a cloud.)
- Which of these strategies use steps? (Using Base-Ten Pieces, Using Expanded Form, Using All-Partials, Using the Compact Method)
Ask students to remove the Addition Strategies
Menu for Larger Numbers from the Student Activity
Book and add strategies not represented to the back
of the menu.
Addition Strategies Menu. The benefits of introducing a
strategies menu are many. The Addition Strategies Menu
presents a variety of strategies for students
to use. They are displayed in a way in which they are all
perceived as equal in status—one strategy is not better or
worse than another. Students are able to choose which
strategy makes sense to them. Students may not be able to
know exactly which strategies are most efficient, but a menu
allows them to begin to think about which strategy is better
for certain situations.
Assign the Add Larger Numbers page in the Student
Activity Book for students to complete individually.
Encourage students to use the Addition Strategies
Menu and the class´s Addition
Strategies Chart as they work. Provide access to
base-ten pieces. Remind students to estimate the
sums first so they can check the reasonableness of
their answers.
Use the Add Larger Numbers page and the Feedback Box in
the Student Activity Book to assess students´ abilities to add two-digit and three-digit numbers using mental math
strategies [E3]; add two-digit and three-digit numbers using
paper-and-pencil methods [E4]; use and apply place value
concepts to make connections among representations [E1];
estimate sums [E6]; find a strategy [MPE2]; and
show work [MPE5].
