2-Digit+Addition+(2nd+Grade)

Contributing Teacher(s): Bonnie A. Noyes
Resources: Student Computers with the Kidspiration 3 file "Working Backwards" saved to the desktop.

Content:
GLE 0206.2.2 Understand and use the base-ten numeration system. GLE 0206.2.3 Use efficient and accurate strategies to develop fluency with multi-digit addition and subtraction. CFU 0206.2.10 Add three two-digit numbers. CFU 0206.2.6 Use various models such as number lines, pictures, and base-ten blocks to illustrate addition and subtraction. CFU 0206.2.8 Use efficient procedures, and understand why they work, to solve problems involving the addition and subtraction of two- and three-digit whole numbers (including those that require regrouping). CFU 0206.2.9 Apply appropriate methods to estimate and mentally calculate sums or differences with ones, tens, and hundreds. CFU 0206.3.5 Understand and use the commutative and associative properties of addition and multiplication.

ISTE Technology:
1. Creativity and Innovation Students demonstrate creative thinking, construct knowledge, and develop innovative products and processes using technology. c. Students: use models and simulations to explore complex systems and issues.

Introduction/Problem: Students need to be able to solve story problems so they can solve real-life math problems.
===Procedures: Using the Kidsiration 3 file "Working Backwards" students will use virtual base-ten blocks to model and solve two-step word problems using the problem solving strategy of working backwards. Students will also fill in the number sentences they used to solve the problem. When finished with the center, students will save their work to the desktop, naming the file with their name and today's date. ===

Student Product/Work: When finished with the center, students will save their work to the desktop, naming the file with their name and today's date.


===Assessment/Rubric: Six points for each correct answer (60 points possible); two points for using base-ten blocks to model each problem (20 points possible); two points for filling in the number sentence and answer for each problem (20 points possible) Use District Grading Scale to determine grade. ===

Use the Kidspiration 3 "Working Backwards" as an example to create your own word problems.
Open your saved file and look for the teacher notes that were added to your file. Correct your mistakes or any unfinished work and resave your file.