The students are learning about Place Value, Comparison, Add and Subtract to 40. The module opens with Topic A, where students study, organize, and manipulate numbers within 40. Students use fingers, linking cubes, dimes and pennies to represent numbers to 40 in various ways- from all ones to tens and ones. They use place value charts to organize units. The topic closes with identification of 1 more, 1 less, 10 more, and 10 less as students learn to add and subtract like units. In Topic B, the students compare quantities and begin using the symbols for greater than(>) and less than (<). In Topic C, the students will focus on addition and subtraction of tens. In Topic D, the students use familiar strategies to add two-digit and single digit numbers within 40. Students will use the following strategies: counting on, making ten, and this time making the next ten. In Topic E, the students will consider new ways to represent larger quantities when approaching put together/take apart with total or addend unknown and add to with result or change unknown word problems. Students begin labeling drawings with numerals and eventually move to tape diagrams to represent the problems pictorially. The module closes with Topic F, focusing on adding like place value units as students add two-digit numbers.