Lesson 1

Time to the Nearest Five Minutes

Est. Class Sessions: 2–3

Daily Practice and Problems

Teacher Notes
X

TIMS Bit

Distribute copies of the Subtraction Flash Cards: Groups 7 and 8. Students circle the facts they know well on the Subtraction Facts I Know charts (from Unit 2). Remind them if they know a fact, they also know its turn-around fact. Students should take the cards for Groups 7 and 8 home to practice with their families.

Ongoing Assessment

Use DPP item A and students' Subtraction Facts I Know charts to assess students' ability to use mental math strategies to subtract, including using doubles and thinking addition, for the facts in Groups 7 and 8 [E9].

See the Letter Home for targeted practice ideas.

A. Subtraction Flash Cards: Groups 7 and 8

With a partner use your Subtraction Flash Cards to quiz each other on the subtraction facts in 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 the facts you need to practice at home for homework.

Update your Subtraction Facts I Know chart. Circle the facts you answered quickly. Underline those you were able to figure out. Do nothing to those you still need to learn.