## Archive for the ‘Class Lesson’ Category

### Mathtrain.TV:Ep.129, Sphere and Cylinder Volume

Sunday, May 15th, 2016

Find the volume inside the cylinder, but outside the sphere.

Part of the student-created tutorial project at Mathtrain.TV.
Mathtrain.TV is a free, educational “kids teaching kids” project from Mr. Marcos and his Students at Lincoln Middle School in Santa Monica, CA.

StudentCreated.TV is a free site for sharing student-created tutorials for all school subjects. Both sites are mobile-enabled.

### Mathtrain.TV:Ep.128, Mini Exponent Review

Sunday, May 15th, 2016

A mini-review of multiplying exponents.

Part of the student-created tutorial project at Mathtrain.TV.
Mathtrain.TV is a free, educational “kids teaching kids” project from Mr. Marcos and his Students at Lincoln Middle School in Santa Monica, CA.

StudentCreated.TV is a free site for sharing student-created tutorials for all school subjects. Both sites are mobile-enabled.

### Mathtrain.TV: EP.119, Pythagorean Theorem from 6th Grader

Friday, February 1st, 2013

Sixth grader, “Poseidon”, makes his debut with a video tutorial on the Pythagorean Theorem.  He used his iPad and an app called, Doceri, to create this screencast.

Part of the student-created Mathtrain.TV Project.

## NEWS UPDATE:

• Mathtrain.TV has been upgraded.  Videos now play on mobile devices, including iPads and iPhones!
• Coming soon, StudentCreated.TV, a free site for sharing student-created tutorials for all school subjects!  Open to the world and focused on student content.  Videos on this site also play on mobile devices such as iPhone and iPad.  Brought to you from the creators of Mathtrain.TV.

### Mathtrain.TV: Ep.112, Create a Tessellation!

Sunday, June 10th, 2012

Let’s have some fun and create a tessellation!

Part of the student-created Mathtrain.TV project.

### Mathtrain.TV, Ep.106, Visual of Subtracting Fractions (mixed numbers)

Saturday, March 3rd, 2012

A visual look at subtracting fractions.  This goes along with another video we made several years ago. Here, we use pizza as a way to help visual this subtraction of fractions.

Original video with alternative method is at http://youtu.be/yXiG2iv1Vq8 .
Part of our Mathtrain.TV Project.

### Mathtrain.TV: Ep.100: Writing Repeating Decimals as Fractions in Simplest Form

Tuesday, September 13th, 2011

A look at how to write repeating decimals as fractions in simplest form.

### Mathtrain.TV: Ep.93, Simple Interest our 2nd Student Mathcast, 2007

Saturday, February 26th, 2011

This is a remix (we added music) of our 2nd student-created mathcast which aired in 2007.  “Billy Billy” was not her real name.  She picked this name as her alias just after “Bob” picked her alias.

### Mathtrain.TV: Ep.91, Percent of a Number

Saturday, February 12th, 2011

Here is a look at how to figure out “percent of a number” problems using a proportion.

### Mathtrain.TV: Ep.90, Finding Percents

Saturday, February 12th, 2011

Watch 6th grader, papatom, explain how to find percents.

### Mathtrain.TV: Ep.88, Metric Conversions II

Wednesday, January 5th, 2011

Another look at metric conversions.

### Mathtrain.TV: Episode 80, The MegaHunk Bar

Monday, November 8th, 2010

Fractions!

This is the story of Rob and the MegaHunk Chocolate Bar that he ate.  But he did not eat the whole thing.  And he did not even start off with an entire bar.

See how to solve this several ways, including visually.  This problem was adapted from my former colleague, Dr. Marcy, and his Marcyworks!

```As seen on Mathtrain.TV!
```