The sheets align with Common Core State standard 2.NBT.A.3. These practice sheets are aligned with Eureka and Engage NY Grade 2 Module 3. Your purchase includes 5 practice worksheets to help students improve on writing numbers in written form, standard form,expanded form, and unit form. These are perfect for morning work or intervention time! Many of the worksheets include an application problem that requires students to explain how they solved their problem. These worksheets are great practice to develop your students' place value skills!