Objective: Students will be able to identify matrices and their elements and organize data into a matrix.

Materials: Slide print-out of lesson, bag of K’nex with 2 red sticks, 2 blue sticks, 2 purple sticks, and 12 random connector pieces, whiteboard, dry-erase markers, and pg. 170 of their Algebra 2 book.


1)    Have students get out their homework while teacher takes attendance.
2)    Have the students pass forward the homework and get out their notebooks to take notes.
3)    Have the students get into groups of 3 of their choice, but they need to push their desks together closely so there aren’t any cracks.
4)    Hand out one bag of K’nex to each group, asking the students to be careful with these K’nex as they are mine and they tend to break easily.
5)    On the board explain what a matrix is, what it looks like, and how to find the dimensions of one.
6)    Have all of the groups create a 2 x 3 matrix with their K’nex using the sticks as the brackets and the pieces as elements in the matrix.
7)    After checking that all of the groups created this 2 x 3 matrix, have the students see how many different sized matrices they can make with what they have.
8)    Each new matrix the students need to write down in their notebook and state the dimensions next to it.
9)    Walk around to ensure all of the groups understand what they are supposed to be doing, then have each group list a couple of the dimensions that they found and write it on the board.
10)    Explain to the students how to find the element of a matrix. Then have the students set up a matrix and quiz each other on what the different elements are.
11)    Walk around and ask each individual student “Where is element such and such?” and have them pick up the piece that represents that element to quickly assess if everyone understands.
12)    Have the students create a matrix in their notebook based on the number of pieces of each color that they have and the type of pieces, labeling the columns as the different types of pieces and the rows as the colors. Do part of it with them, then have them finish it.
13)    Use the two additional examples from the lesson-slides to allow the students to see different ways that these types of problems can be presented.
14)    As a last check, put the lesson quiz on the overhead and have the students complete it.
15)    Allow the students time to work on their homework: pg. 170 1-10 all, 12-18 even.