Day 15: Least Common BizzFuzz

6th Grade Math Standards: Find the greatest common factor of two whole numbers less than or equal to 100 and the least common multiple of two whole numbers less than or equal to 12. Use the distributive property to express a sum of two whole numbers 1–100 with a common factor as a multiple of a sum of two whole numbers with no common factor. For example, express 36 + 8 as 4(9 + 2). MA.4.a. Apply number theory concepts, including prime factorization and relatively prime numbers, to the solution of problems.

Objective: Find the least common multiple of two or more numbers.

Quote of the Day: “If he is not totally frightened at some point in every day, he is not stretching himself far enough...There is nothing that you are presently doing that you did not have to learn. At one time the things you are now able to do were unfamiliar and frightening. This is the nature of life. But the important thing to remember is that you can learn.” - Dr. Henry Cloud and Dr. John Townsend

Question of the Day: "Are prime numbers always separated by 6 numbers?"

Agenda:

1. Estimation 180 Toilet Paper
2. QSSQ
3. Pepper with many factor and multiple examples as well as the divisibility rules
4. Cookout Dilemma
5. Father of the Bride 
6. Least Common Multiple Notes 
7. Fizz Buzz 
8. Start the homework which was just standard LCM problems 

Assessment: When students started the homework and did the notes I checked their work.

Glass Half-Full: Tons of good discussion today. Lots of movement breaks.

I tried something new with this lesson today. In the notes I did two examples (A and C) in which the greatest common factor of the two numbers being compared was 1 and then two examples (2 and 4) in which the greatest common factor was not one. After I had solved the problems by looking at the multiples, I had students partner up and see what they noticed about the differences between problems A and C vs problems 2 and 4. It was not immediately recognizable, but eventually students were able to wrap their heads around it.

Regrets: Using the words tons and lots above. I see it in their writing enough so I start to believe it is good writing meself.

Homework: 9 problems where students have to find the LCM of either two, three or four different numbers.

Link of the Day: Using this problem for Math Academy tomorrow. I think it will lead to some good discussion.