Unit 8 Topic 3: Tens
inv1_u8.pdf 


3.1 Games About Combinations of Ten
Students review and play Make Ten and Tens Go Fish, games learned in Number Games and Story Problems. Class discussion focuses on generating a list of 2addend combinations of 10.

Morning Meeting: Time Follow your daily Morning MeetingRoutine. During Daily Schedule, post the time of events on the classroom schedule using both analog and digital representations. Focusing on activities that start on the hour, ask students questions about what time different activities happen: What's happening at 9 o'clock this morning? [Science] What time does [math] start? [10:00] What time is dismissal? [2:00]

3.2 Roll Tens
Students learn, play, and discuss Roll Tens, a game that involves collecting connecting cubes and grouping them in rows of 10.

Start With/Get To: Counting by Groups Set aside the 5, 10, and 100 cards. Pull the 10 card from the start with basket and the 100 card from the get to basket. Count aloud as a class, by 10s to 100 while keeping track on the number line or 100 chart. Repeat using 5 as your start with card and count by 5s to 100.

3.3 Ten Plus
Students learn, play, and discuss Ten Plus. In this game, students combine two singledigit numbers (e.g., 7 + 8) and then record that total in terms of how it relates to 10 (e.g., 10 + 5).

Quick Images: Dot Combinations Show transparencies of Dot Addition Cards (T24) that total 10, beginning with 5 and 5. Follow the basic Quick Images activity. Ask students to determine the total number of dots and to share their strategies. Repeat with 5, 2, and 3, and then, 4, 3, and 3.

3.4 Tens and Ones
Students continue to work on activities that focus on the 2addend combinations of ten and on thinking about and using ten. Class discussion focuses on tens and ones.

Tell a Story Write "9 + 7 =" on chart paper. Ask students to suggest a story problem. After several students have shared ideas, have students solve the problem. If time permits, repeat using "16 – 6 =".

3.5 Equivalent Expressions
Students continue to work on activities that focus on the 2addend combinations of ten and on thinking about and using ten. Class discussion focuses on strategies for Ten Plus and the
equivalence of different expressions.

Start With/Get To: Counting by Groups Set aside the 5, 10, and 100 cards. Pull the 10 card from the start with basket and the 100 card from the get to basket. Count aloud as a class, by 10s to 100 while keeping track on the number line or 100 chart. Repeat using 5 as your start with card and count by 5s to 100.

3.6 EndofUnit Assessment
Students solve two problems about combining equalsized groups and play Tens Go Fish with the teacher to assess their fluency with the combinations of ten.

Quick Images: Dot Combinations Show transparencies of Dot Addition Cards that total 10, beginning with 4, 4, and 2. Follow the basic Quick Images activity. Ask students to determine the total number of dots and to share their strategies. Repeat with 5, 1, and 4, and then, 3, 3, 3, and 1.
