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Background For Teachers:
These vocabulary terms should be taught and emphasized during the lesson:
Intended Learning Outcomes:
Have students come to the board and draw an input/output T-chart with five rows. Then have each student write down the five numbers you call out on the input (left) column such as 5, 12, 18, 25, and 40. Remind students that the input is the number to which an operation rule is applied, and that the output number is the result of that operation. Next announce a rule such as “add 15” and have each player write the rule at the top of their chart. On a signal, the students fill in the output column using the rule, then turn and face the class. When both are finished have the class help you check their work. They could score one point for each correct answer and five points for whoever finishes first. Continue playing with different input numbers and different rules. This will help students feel comfortable with how these types of tables work. In addition, you could have students who are still in their seats do this activity in their math notebook at the same time as those who are doing it on the board.
Have students prepare to write down a series of numbers and try to figure out the pattern. Using the overhead calculator and without letting the students see what you are entering, enter 2 + 5 =; let the students see the 7 then continue to press the = button several times (they will see 12, 17, 22, 27, etc.).
When several students believe they have figured out the pattern rule allow them to share. You can also have them observe the number in the ones place. How long is it before the pattern begins to repeat? Do this activity several times with different beginning arithmetic problems.
Homework and Family Connections
Students could also do the extension activity at home and create In/Out charts
with their own rules and fill in several examples on the chart.
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