Teacher Notes
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TIMS Bit
Students continue the review of each of the Subtraction Fact Groups. Have students work with a partner to sort their Subtraction Flash Cards: Groups 7 and 8 and update their Subtraction Facts I Know charts. Flash cards for Groups 7 and 8 were distributed in Unit 5. Flash cards for all groups were also included in Unit 6, if needed. Students should take their flash cards home to practice with a family member.
Remind students that they can use strategies like using doubles, counting up, or thinking addition to help them learn the subtraction facts in Groups 7 and 8.
Bit W is a quiz on the subtraction facts in Groups 7 and 8.
Ongoing Assessment
Use DPP item O as a self-assessment of students' abilities to use mental math strategies to subtract for the facts in Groups 7 and 8 [E10].
See the Letter Home for suggestions for targeted practice.
O. Subtraction Flash Cards: Groups 7 and 8
With a partner, use your Subtraction Flash Cards to quiz each other on the subtraction facts for Groups 7 and 8. Separate the used cards into three piles: Facts I Know Quickly, Facts I Can Figure Out, and Facts I Need to Learn. Practice the last two piles again and make a list of facts you need to practice at home for homework.
Circle the facts you know quickly on your Subtraction Facts I Know chart.
