In 2nd grade, students are introduced to addition with and without regrouping. This unit takes the first step toward that goal by adding 2-digit numbers with sums to 100. Students will use digital manipulatives including linking cubes and place value disks. Additionally, students will use the representational model of drawing dots on a place value chart to add. Students will relate these models to a written method. This unit includes all of the assessment materials, lessons and digital independ