Fluently add and subtract within 100 using strategies based on place
value, properties of operations, and/or the relationship between
addition and subtraction.
Name |
Description |
How Much Do We Need to Order? | This is an inquiry lesson in which the students will be posed a real world problem and be given the task to come up with a way to gather their data and solve the problem. |
Fundraising on a Budget | This Model-Eliciting Activity (MEA) is designed for a second grade level. Students will be working in small groups to figure out what companies to hire for the art gallery to have a successful charity event. The students will be evaluating criteria such as bands for the event, caterers, and artists. Students will need to add money to stay within a budget. They will write their procedure for making their selections.
Model Eliciting Activities, MEAs, are open-ended, interdisciplinary problem-solving activities that are meant to reveal students’ thinking about the concepts embedded in realistic situations. Click here to learn more about MEAs and how they can transform your classroom. |
Carnival | Written at a second grade level, in this MEA the students will use problem solving skills, two-digit addition, and knowledge of greater than and less than to rank order carnival games based on provided criteria. Model Eliciting Activities, MEAs, are open-ended, interdisciplinary problem-solving activities that are meant to reveal students’ thinking about the concepts embedded in realistic situations. Click here to learn more about MEAs and how they can transform your classroom. |
What is your new number when you add or subtract? | This is an ability grouped tiered lesson of addition or subtraction of one or two-digit numbers less than 100. |
Cookie Contest | This MEA asks students to decide which factors are important in choosing the best cookie in a cookie contest. Students will take on the role of cookie critics to provide feedback to a teacher whose grade level is deciding which cookie to use for a fundraiser. They will rank order their choices from the best to worst cookie. Students will provide a detailed written explanation for how they decided to rank factors and their solution. They will show their work while adding up to 4 two-digit numbers to calculate the total number of votes. Model Eliciting Activities, MEAs, are open-ended, interdisciplinary problem-solving activities that are meant to reveal students’ thinking about the concepts embedded in realistic situations. Click here to learn more about MEAs and how they can transform your classroom. |
Birthday Parties 'R' Us | Students will determine which pizza place should be used to cater parties at the Birthday Parties 'R' Us facility given a set of data. They will create a procedure for determining the best pizza place, write an explanation about their procedure, and present their recommendations to the class. Model Eliciting Activities, MEAs, are open-ended, interdisciplinary problem-solving activities that are meant to reveal students’ thinking about the concepts embedded in realistic situations. Click here to learn more about MEAs and how they can transform your classroom. |
Rip and Regroup to Add | Students will learn how to transpose a horizontal addition equation with two-digit addends using a specialized vertical place value work mat. Students will "rip and regroup" to help understand how to regroup ten ones as one ten and move toward using a standard algorithm for addition. |
Adding and Subtracting on a Hundred Chart | This lesson is not an introduction to adding and subtracting on the hundreds chart, but rather a practice of strategies to help build fluency. Students will use make-a-ten, decomposition, and other number sense strategies to create hidden designs on a hundreds chart then check their design against the answer key. |
Alternative Addition Strategies | This lesson explores various addition strategies of two-digit numbers. The lesson focus is to encourage students to find and develop a reliable method they can use to add within 100. The lesson includes making an Addition Strategies Mini Booklet, which students can keep and use as a reference tool. |
Is it "Most Magically Magical"? | This lesson is intended to be a cooperative inquiry-based activity used close to the end of second grade. The students will be actively engaged in adding and subtracting numbers within 100 while having fun completing Magic Squares. |
Sweet Addition and Subtraction | This lesson is a continuation of the "Sweet Values" and "Sweet Number Places" lessons also found on CPALMS. It is a different way of teaching addition and subtraction, by continuing a story that started with place value. In this lesson, students will learn to use the place value knowledge gained to solve word problems. |