# Using Numbers to Predict the Future

6 teachers like this lesson
Print Lesson

## Objective

SWBAT use patterns and the measures of tendency to make numerical predictions.

#### Big Idea

Students will calculate weighted averages. Students will use the properties of "9" to predict the value of a mystery number.

## Do-Now

10 minutes

This lesson is planned to fall during our school's homecoming week. There will be many exciting school pep rallies and celebrations held throughout this time, so there is a huge feeling of energy and enthusiasm felt from both teachers and students. Even though today's activities deviate away from our normal Algebra Curriculum, they are still math based, and will give students a place to channel the high energy from the events.

Our Do-Now will be a writing activity. When students enter the room, a prompt will be written on the board:

• Write a poem or a haiku about Algebra. Be creative!

After 5 minutes students will share their responses, and the class will then vote on which was the best. Students will be completing this activity on construction paper, and I will display them in the hallway for the rest of the building to enjoy.

## Group Activity: Weighted Averages

35 minutes

My students take 8 different classes throughout the year, all with different class requirement and grading schemes. Students receive syllabi during the first week of school stating these class guidelines, but have misplaced it soon there after. There is great confusion amongst them why one homework assignment can increase their overall grade by 20 points in one class, but only 2 points in another.

This Presentation and Handout review weighted averages, giving students the tools they need to better understand the math behind their grades. The majority of this lesson should be completed as a whole group. Students can work individually or in pairs on Slides 17 - 21.

This portion of class will close with the discussion questions on Slide 22 and Slide 23.

## Group Activity: Magic Math

35 minutes

This activity is a lot of fun, and one of my favorite activities to complete with students. Using the Flash Mind Reader, students will explore the properties of the number nine. This website should be displayed in the front of the room when the activity begins.

I begin by making a large bet with the entire class. I will say, "This website is magic, and it can read your mind." My students will laugh at this notion, of course, so I will then up the stakes, "If it reads your mind incorrectly, the entire class will have NO homework for an entire month!"

We will then begin using the website. The following instructions should be given aloud to students:

1. Pick a number between 10 and 99.
3. Subtract the sum from your original number.
4. Take this final number and look up the symbol on the chart.