In this online game, students will be building numbers using Base 10 blocks.  Students decide if they want to select ones, tens, or hundreds.  Students also get to choose if they want to read the number, listen to the number, or if they want to count the blocks given and deterine the number being represented.

According to Achieve the Core, (achievethecore.org), "The joint purpose of this task is to provide students an opportunity to practice two-digit subtraction with regrouping and to engage students in looking for and expressing regularity in repeated reasoning (MP.8). Throughout grade 2, students need many opportunities to practice subtraction in order to achieve fluency subtracting within 100 by the end of the grade. For students in grade 2, it is sufficient for them to recognize that differences of 9 will stem from numbers whose digits differ by 1, subtractions resulting in 18 will stem from numbers whose digits differ by 2, etc. "

 This resource was created to help educators of students aged 3-8 plan a family engagement session/night. Included in this resource is a flyer that can be sent to your community. This flyer is fully editable and can be customized to your needs. The facilitation guide will help you with the steps you should take to plan, organize, and hold the family engagement session. In the facilitation guide, there is a resource that can be handed to parents either digitally or in a physical copy. As a gift to your participant, a game can also be sent home with them. We suggest that these games, one per grade level, be prepared as directed so that they are ready to be used immediately. This family engagement experience can be set up to meet your needs; however, to accommodate many participants, we have designed it so that participants move through a series of stations. Each station is based on a grade level. We understand that you may have parents only interested in the grade level their child is enrolled in, but we suggest that you encourage parents to visit all stations so that they can see the progression of mathematics from pre-kindergarten through second grade.

Big Ideas: The same number can be shown in many different ways. 10 bundles of 10 can be combined to make a “hundred."
This lesson introduces the concept of "hundreds" and the various ways that one hundred can be made using groups of tens and ones. The task presents a basketball game in which the points are base ten values. The students are asked to think about and represent the different ways one could score 100 points. Understanding that there is no one "right" way to represent a number using base ten helps students have a solid foundation for later skills such as place value of 3 and 4 digit numbers, addition and subtraction with regrouping, and multiplication.
Special Materials: Base Ten Blocks

The point of this task is to emphasize the grouping structure of the base-ten number system, and in particular the crucial fact that 10 tens make 1 hundred.

Lesson objective: Represent numbers in two or more equivalent ways.
This lesson helps to build fluency with place value concepts. Drawing is used here because it supports students moving on from concrete (the base ten blocks) to more representational in the concept. This work develops students' understanding that three-digit numbers can be represented in different, but equivalent ways.
Students engage in Mathematical Practice 7 (Look for and make use of structure) as they understand that three-digit numbers have more than one way to be represented; this comes with repeated experimentation with our place value system.
Key vocabulary:
hundredsplace valuerepresentionstens