##
* *Reflection: Staircase of Complexity
Twelve's - Section 3: Timed Test

*Grid Reflection 12*

*Staircase of Complexity: Grid Reflection 12*

# Twelve's

Lesson 13 of 13

## Objective: Students will be able to fluently multiply with 12's.

*60 minutes*

#### Concept

*15 min*

Down to the end. The last fact to complete the 12 by 12 grid of basic multiplication facts is finally here. 12 x 12

I have included a short video for multiplying by 12. This is meant to be more of a review and practice instead of a concept introduction.

#### Resources

*expand content*

#### Practice

*30 min*

**Spinner Tool**

Students are given one of the spinners to fill out as a reference tool. The tool will be primarily used during the current level of the multiplication program but should be kept as a reference going forward to higher levels.

**Flashcards**

There is a set of flashcards provided for the current level. Each set of flashcards include the facts with their turn-around facts. It is important that the students are comfortable with the commutative property of multiplication.

**Games for Practice**

**Jumbo Tic-Tac-Toe**

- Each player chooses one factor (2-12)
- Record the factor in the top of second column
- Toss 2 dice and find the sum
- Multiply the sum by the factor
- Record the product next to the sum in the table
- If the sum has already been filled, lose a turn
- First player to complete the table wins

**Line It Up**

- Toss 2 dice and find the sum
- Multiply the sum by 2
- Place a counter on the product
- If the product has a counter on it, lose a turn
- First player to build a full row or column wins

**Face-Off**

- Each player chooses one factor (2-12)
- Record the factor in the top of second column
- Toss 2 dice and find the sum
- Multiply the sum by the factor
- Record the product next to the sum in the table
- If the sum has already been filled, lose a turn
- First player to complete the table wins

*expand content*

#### Timed Test

*15 min*

There are three timed tests associated with this final factor. The first timed test is designed to be a one minute test of 40 problems and includes only multiplication facts with the 12 factor. The second timed test is designed to be a two minute test of 60 problems and includes all multiplication facts learned in the leveled program thus far.

The final multiplication test is level X which includes 100 problems to be completed in 5 minutes.

*expand content*

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