Friday, February 28, 2014
Thursday, February 27, 2014
After our lesson on transformations the day before, the kids used
cartoon pictures to model each type of transformation two different
The reflection was a little more challenging. The kids had to figure out they needed to trace the shape through the back of the page to model a reflection. Love that logical thinking!!!
Friday, February 21, 2014
|Transformations Anchor Chart|
A geometrical transformation is simply the changing of an object's position. The size and shape of the object do not change, only the position. There are three types: Translation, Rotation, and Reflection.
A translations is a slide. There are no flips or turns. A reflection is a flip, or mirror image. If it is a reflection, we should be able to draw a line of symmetry in between the shapes. A rotation is a turn along a certain point.
Tuesday, February 18, 2014
We introduce volume by looking at different shapes made out of linking cubes. It's an exploration to determine the best way to count the number of cubes within the shape. We discuss ways to keep ourselves from counting the cubes more than once. It's an easy mistake to make when looking at the cube from different angles. The best way we came up with was to look at the shape in layers. Figure out the number of shapes in the initial layer, then determine how many layers there are. This leads the kids to self-discover the formula V = L x W x H. They usually pick up on this very quickly.
|We're determining the volume of this shape...|
|So we look at the top layer...|
|Then figure out the total number of layers|
Here are our journal entries from the last few days...
|Our initial journal entry|
|Practice counting units|
|After self-discovering the formula...|
|Our Volume Anchor Chart|
Wednesday, February 12, 2014
After finding the pictures, the students used the app Educreations to create a movie slide show with narration telling about each angle. For example, when an acute angle is pictured, the kids can be heard saying, "This is our example of an acute angle. Acute angles can measure from 1 degree to 89 degrees. We estimate this angle to be about 45 degrees."
Thursday, February 6, 2014
This is an example of our journal page for 3-D shapes. By 4th grade, most kids are pretty aware of the attributes of 3-dimensional shapes. I do usually have couple of misconceptions to clear up. The first is that this is a rectangular prism. This is actually a square prism. Prisms all have rectangular faces around the middle. It's those two side faces that tell us it's name.
Rectangular prisms actually look like this:
The second misconception is that bases are the faces on the bottom of the shape. Actually, bases only exist when the shape has a curve. The only shapes we discuss with bases are cylinders and cones.