8th Grade Math - Unit 6b: The Volume of Solids

The next unit in our Geometric Relationships was the Volume of Cylinders, Cones and Spheres.The first part of the unit focused on finding the volume of a cylinder and practice with basic cylinder volume problems.

Students practiced Recorder/Reporter style and the teams collaboratively solved problems finding the volume of cylinders.

iMath – Showbie “Paperless” Assignment

Students practiced finding the Volume of Cylinders in my"Paperless" Showbie Assignment. 

Math 8 - Showbie “Paperless” Collaborative Team Task
The next day the students did a my collaborative "Team Task" on Finding the Volume of Cylinders using my cylinder collection. Throughout the year I had saved different cylinders for this activity.  I labeled the cylinders and set them out on an empty set of desks. The students were very intrigued when they came in and saw the collection of cylinders.

 In the "Team Task" the students took turns being "Team Mathematician".  The "Team Mathematician" chose a cylinder from the selection and brought it back to the team.  

The "Team Mathematician" measured the height and the diameter of the chosen cylinder and read them to the team. The team then calculated the volume of the chosen cylinder together.  The students repeated this process throughout the "Team Task".  All Team Members were "Team Mathematician" multiple times throughout the task.

As you can see the students really enjoyed this task. :o)

The next part of the unit focused on finding the height or the radius of a cylinder given the volume of the cylinder.

Students did a round of Recorder/Reporter and the teams collaboratively solved problems finding the height or the radius of cylinders.

iMath – Socrative (Self-paced) “Digital Task Cards”

After practicing with their teams, students did my Socrative (self-paced) "Digital Task Cards" lesson on Finding the Height or Radius of a Cylinder.

Here is my Socrative Code. Feel Free to Use. :o)

Finding the Height or the Radius of a Cylinder:  SOC-20875587

The next part of the unit focused on finding the volume of a cone and practice with basic cone volume problems.

Students practiced Recorder/Reporter style and the teams collaboratively solved problems finding the volume of cones.

iMath – Showbie “Paperless” Assignment

Students practiced finding the Volume of Cones in my"Paperless" Showbie Assignment. 

The next part of the unit focused on finding the height or the radius of a cone given the volume.

Socrative: Finding the Volume of Cylinders and Cones "Team Task"

We ended this part of the unit with my Socrative Collaborative "Team Task" on the Volume of Cylinders and Cones.

Here is my Socrative Code. Feel Free to Use. :o)

Volume of Cylinders and Cones Review "Team Task":  SOC-20945728

The next part of the unit focused on finding the volume of a sphere and basic sphere volume problems.

Students did a round of Recorder/Reporter and the teams collaboratively solved problems on finding the volume of spheres.

iMath – Socrative (Self-paced) “Digital Task Cards”
After practicing finding the volume of spheres with their teams, students did my Socrative (self-paced) "Digital Task Cards" lesson on Finding the Volume of a Sphere.

Here is my Socrative Code. Feel Free to Use. :o)

Finding the Volume of a Sphere:  SOC-20975396

The next part of the unit focused on comparing volumes and composite volumes.  The students did well with this part of the unit because I encouraged them to leave their answer in terms of pi until the very end.

Students did a round of Recorder/Reporter and the teams collaboratively solved problems with composite volumes.

iMath – Socrative (Self-paced) “Digital Task Cards”
After practicing with their teams, students did my Socrative (self-paced) "Digital Task Cards" lesson on Finding the Volume of Composite Figures.

Here is my Socrative Code. Feel Free to Use. :o)

Finding the Volume of Composite Figures:  SOC-21067857

The next part of the unit focused on reviewing and solidifying their understanding of finding the volume of cylinders, cones and spheres.  I created a Poster Task for the students to practice finding and comparing volumes.

iMath Lesson - Comparing Volumes Poster Task

Students showed their understanding of this concept in my Showbie Poster Task on Comparing Volumes Ice Cream Task.

Socrative: Volume of Cylinders, Cones and Spheres "Team Task"

We ended the unit with my Socrative Collaborative "Team Task" on The Volume of Cylinders, Cones and Spheres.

Here is my Socrative Code. Feel Free to Use. :o)

Volume of Cylinders, Cones and Spheres "Team Task":  SOC-21093725

Unit Reflection
This year I tried something new with this unit.  In the past my students always forgot or confused the volume formulas without their notes.  So after learning each formula, I had the students make a flashcard for that formula.  After learning all three formulas, I had the students independently practice the flashcards in iMath each day. Each day in iMath, the "Blast From the Past" assignment told the students to practice the flashcards without using their notes and to leave a comment on how they did with the formulas. This really helped the students remember the formulas for the rest of the year. 

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