This resource accompanies our Rethink 2nd Grade Math Number & Operations in Base Ten unit. It includes ideas for use, ways to support exceptional children, ways to extend learning, digital resources and tools, tips for supporting English Language Learners and students with visual and hearing impairments. There are also ideas for offline learning.
This unit was created by the Rethink Education Content Development Team. This course is aligned to the NC Standards for 2nd Grade Math for Number & Operations in Base Ten.
In this assessment task, students compute problems that add and subtract 10s and 100s and explain their thinking.
Students are lifeguards who must save the swimmer. Students are shown a number line indicating where the swimmer is located. The distance between the boat and swimmer is indicated beneath the 10 & 1 gears. Students must move the boat using the 10 & 1 gears to the correct number in order to rescue the swimmer.
Sample Learning Goals
Improve understanding of place value by using different sizes of papers for ones, tens, and hundreds.
Develop mental math strategies when taking apart and putting together numbers.
Use the “make a ten” strategy when counting and doing addition.
Develop a mental model of the basic properties of numbers including commutativity, associativity, and closure.
This document is the About the Cluster document created by the authors of the NC2ML Instructional Frameworks. Read this document prior to teaching the cluster in order to get insight into the clustering of the standards, mathematics to be taught, and important considerations.
This document is not remixable since the document has been written by creators of the NC2ML Instructional Frameworks.
This 2 unit of number and operations lessons explores multi-digit addition and subtraction through 4 hands-on activities and 1 worksheet.
This 2 unit of number and operations lessons explores more multi-digit addition and subtraction equations through 7 hands-on activities and 9 worksheets.
This task acts as a bridge between understanding place value and using strategies based on place value for addition and subtraction.
A learning road map is a great way for students and teachers to keep track of standards they have mastered. This road map is for grade 2 math cluster 1. It can be printed and placed in a data notebook. Students would then color in the circle to indicate their level of proficiency. It could also be used digitally where students would fill in the circle with color. Road Maps help students take ownership of their learning and help guide instruction for teachers. This resource was developed as part of a professional learning opportunity funded by the NCDPI Digital Learning Initiative Planning Grant.
This is a blended unit based on Unit 3 of the second grade Everyday Math series.
This unit will focus on strategies for solving subtraction problems within 20. Students will learn strategies including: counting up and back on a open number line, using their knowledge of addition/subtraction facts within 10 to solve larger problems, and using doubles facts to solve subtraction problems. This unit builds on the last unit as students lean on their addition knowledge to help with subtraction. The big goal is for students to develop fluency with subtraction facts within 20.