Here's a better idea: I should have helped my students discover rounding patterns so they could generalize and extend their understanding of how the base ten system works.
I also should have helped them develop a stronger concept of what rounding actually is, why we use it, and how it works.
There are two main options for organizing Alphabet books with upper elementary students:
2. Mutually Exclusive Groups:
Students classify shapes in to two or more mutually exclusive categories. Each shape can only fit into one category based on its geometric attributes.
Example: classifying triangles by number of equal sides
3. Side-by-Side Sorts:
Students classify the same set of shapes into two different sets of categories, so they can compare and contrast the two different classifications.
Example: sort triangles by angle size, and then sort them by side length
4. Venn Diagram:
Students classify shapes onto a Venn Diagram so they can see the geometric attributes they have in common.
Example: comparing and contrasting the geometric attributes of a rhombus and a rectangle
5. Overlapping Circles (Hierarchy):
Students classify shapes into overlapping circles. The largest circle represents the largest category of attributes (e.g., polygons), and the smallest circle represents the smallest/ most specific category of geometric attributes (e.g., squares). This way of classifying is more complex because students have to consider subgroups and the hierarchy of attributes.
Example: polygons/ quadrilaterals/ parallelograms/ rectangles/ squares
Discussion Questions about Classifying Shapes:
-What geometric attribute makes this a ____ ?
-How do you decide how to classify a shape?
-Why did you put this shape in this category?
-How could you change this shape so it would go in a different category?
-What geometric attribute do all the shapes in this category have in common? Do they also have anything else in common?
-What would you call this shape? Why? Could you call it anything else?
-What geometric attribute would a shape need to be in this category?
-Are there any geometric attributes that would keep a shape OUT of this category?
-How are ___ and ___ related?
-Do the shapes in these two different categories have any geometric attributes in common? Are these subcategories of a bigger category?
PS: Looking for some pre-made, Common Core- aligned sorts, lessons, and activities?
Happy Teaching (and Sorting)!!