Educational Thoughts, Ideas, and Resources for Teachers

Inductive vs. Deductive Reasoning

One of my favorite Geometry lessons is the one introducing inductive and deductive reasoning. It’s fun and engaging. I like to open the lesson by showing the students a YouTube video: Monty Python Deductive Reasoning (Should be called Inductive Reasoning, but oh well!)

This lesson has many opportunities for discussions on how people reason and come to the wrong conclusions. You can bring up the media, social media, racism and many topics where people might come to the wrong conclusions. I also like to talk about predicting weather. the topics are endless.

My lesson from Teachers Pay Teachers has several handouts that can be added to the student’s interactive notebook. One of the activities is to have students cut out the examples seen below and place them with the correct headings: Deductive or Inductive.

The lesson also includes some 12 task cards. I like to group the students into fours and have them turn their desks together. They put the task cards in the middle of the tables and select a card, answer it on an answer document and then place the card back into the middle of the pile. Here’s a sample:

Finally, the lesson has a short 3 question worksheet that I like to use as a group quiz. I have the students work together through the quiz. They all have to write on their own paper. I assign each person a letter and they put it beside their name. After about 15 minutes or less, I spin a spinner that has A, B, C, or D on it. The person with the letter I land on, puts their paper on top and that is the one I grade for the group. I tell them this ahead of time. This gives them incentive to work and make sure everyone is participating.

Here is a copy of the resource that I have on TpT. Take a look. It’s also a part of a unit as well as in my Geometry Curriculum.