I love function tables for practicing facts! Not only do students develop fact fluency through practice, but with function tables they also develop a deeper understanding of the relationship between the operations. I’ve just finished up my first Robot Rules product–** a Valentine-themed set for addition and subtraction**–and I wanted to give you a closer look.

66 cards for all addition and subtraction facts from 0 to 10 with three levels of difficulty. |

One option for the cards is to laminate them and place them in a workstation with wipe-off markers. I would definitely suggest, however, using one of the recording sheet options to provide accountability and serve as a formative assessment.

The 1-star cards are the easiest. The input numbers and the rule are given and students only need to apply the rule to the input numbers to find the output. Notice, however, that the input numbers are not in order. This causes students to have to think about their solutions, even at the simplest level.

We start to see algebraic thinking at the 2-star level. Students are still given the rule, but now they are asked to find either the input or output. This is very difficult for some kiddos. For example, they might be tempted to fill in 19 for the In on the second row, because 14 + 5 = 19. Be sure to model this type of card extensively before having students work with them independently. It’s helpful for kiddos to learn to read a missing input as “

*what*plus 5 equals 14?”. Or, of course, they can subtract 5 from 14. As a check, I always suggest students read back each entry in the table after filling them in. So, for example, if they had mistakenly written 19 as their solution in the second row above, they would read it back as “19 + 5 = 14” and they should catch their mistake. All part of**!**__attending to precision__At the 3-star level, students are given one pair of numbers, must determine the rule using that pair, and fill in the table.

An addition/subtraction chart is provided for student support. |

Answer keys allow students to self-check their work. |

Let’s take a look at recording options. Most of the record sheets are half page, so they can be easily glued into a student’s math journal. |

Function tables naturally lend themselves to a discussion of fact families, due to their structure. This recording sheet capitalizes on that relationship. Students record their work from two different cards and then choose one pair from each card and write the corresponding fact families. If, for example, the card is +5, they might choose the pair 3 + 5 = 8 and write the fact family to go with it (3 + 5 = 8, 5 + 3 = 8, 8 – 5 = 3, 8 – 3 = 5). I find that if students actually touch the numbers on the card while reciting the addition and subtraction facts, it helps solidify that understanding. It’s very much like a . So they would touch the input (3), the rule (+5), and the output (8) while saying 3 + 5 = 8. Then they would touch the output (8), the rule (+5), and the input (3) while saying 8 – 5 = 3. Touch the rule (+5), the input (3) and the output (8) while saying 5 + 3 = 8. And finally touch the output (8), the input (3) and the rule (+5) while saying 8 – 3 = 5.triangular flash card |

I hope you like this new product and can see how beneficial it would be for your kiddos! There’s also a

__non-Valentine version__.

PERFECT!!!! Thanks again! Can’t wait to see the M/D ones!

Working on them… 🙂

YESYESYESYES- I need the M/D ones! 🙂

Shannon

http://www.irunreadteach.wordpress.com

Ha ha! Love the enthusiasm, Shannon! I’ll try to hurry!