Today we looked at complementary and supplementary angles. Complementary angles are angles which add up to 90 degrees. Supplementary angles are angles which add up to 180 degrees. We can use what we know about these angles, as well as look at their adjacent angles, to determine missing angle measurements.

## Friday, January 13, 2017

### Complementary and Supplementary Angles

Posted by Rebecca May at 9:16 AM 0 comments

## Wednesday, January 11, 2017

### Types of Triangles

Today we learned about different types of triangles - right, acute, and obtuse. We discussed that all triangles have two acute angles. The third angle is what determines its type. If the third angle is also acute, it's an acute triangle. If the third angle is right, it's a right triangle. If the third angle is obtuse, it's an obtuse triangle.

## Tuesday, January 10, 2017

### Naming and Measuring Angles

We began the week naming angles. Most of the students were familiar with the types of angles, but we reviewed the important characteristics of straight angles, obtuse angles, acute angles, and right angles.

We went back to everything we already know about angles. Going in a complete circle means we have gone 360 degrees, while only going halfway around means we have gone 180 degrees. We already know that a right angle is 90 degrees. We already know a straight angle is 180 degrees. We know an acute angle measures between 1 degree and 89 degrees. We know an obtuse angle measures between 91 and 179 degrees. Once we illustrated that, we decided we could half each 90 degree piece and figure out where 45 degrees and 135 degrees are located. Next we moved to

Posted by Rebecca May at 12:48 PM 0 comments

## Monday, January 9, 2017

### Lines and Angles

We began lines and angles this week. We began with introductions of the different types of lines and angles, then moved to making them on dot paper. We moved on to looking at specific lines and angles within a large collection. This lead to the discussion of why it is important to have points on our lines - so we can name the ones we're specifically trying to reference.

Posted by Rebecca May at 11:07 AM 0 comments

## Monday, December 12, 2016

### Mixed Numbers and Improper Fractions

After lots of examples with pattern blocks, we moved to pictures in our journals. We started with the mixed number, drew the picture, then named it as an improper fraction. After several of those, we started with the improper fraction, drew the picture, then named it as a mixed number.

The next day, we talked about how we went between the two types of fractions using pictures to help us. After examining our pictures, we noticed some shortcuts to help us be more efficient when changing from one type of fraction to the other. Eventually, the kids discovered the multiplication and division connection to help speed them along.

Our Classroom Poster |

Posted by Rebecca May at 9:02 AM 0 comments

Labels: 4th grade, Fractions, Improper Fractions, math, Mixed Numbers

## Friday, December 9, 2016

### Strip Diagrams to Model Computation

Division and Subtraction Strip Diagrams |

Multiplication and Addition Strip Diagrams |

Posted by Rebecca May at 1:38 PM 0 comments

Labels: 4th grade, addition, division, math, Model, multiplication, Strip Diagrams, subtraction

## Friday, October 28, 2016

### Fraction Review and Intro to Improper Fractions

This week we took a brief look at fractions. We started by reviewing what we already know about fractions such as definitions and pictures.

Posted by Rebecca May at 11:55 AM 0 comments

Labels: 4th grade, Fractions, Improper Fractions