The Common Core State Standards in Mathematics is really emphasizing number lines in student work with numbers. So I thought I’d include one on a What Do You Notice? Poster at last night’s Family Math Night event. But in order to reflect both the primary and intermediate grades, not only did I include the counting numbers, but I marked the fourths, as well. Some students noticed the color pattern I used – even numbers are blue and odd are red….
So for this What Do You Notice? poster, I decided to tie in rectangular arrays with prime and composite numbers. That said, whatever math-y thing students notice is totally acceptable. For example, one student noticed that the “buildings” had square windows. Great. That’s a little bit of geometry. Another student noticed that each set of colored rectangles included the same number of squares. Again, great, as that required some counting and comparison. Just like the student who noticed that there are…
Here’s my latest What Do You Notice? poster from a recent Family Math Night event. The nice thing about these posters is that they’re open-ended which allows for anyone to respond. For this one, I decided to make a venn diagram. But I didn’t draw the usual circles. Instead I drew two hexagons. This created the rhombus (parallelogram) in the center. The categories I used for the numbers were even numbers and multiples of 5. That said, anything appropriate would have…
I recently had a conversation with a friend about different ways to get her second graders to learn their addition and subtraction facts. She was looking for alternatives to flashcards. So I shared with her something I do with K-2 students called subitizing. Subitizing is being able to quickly recognize the number of objects in a small set without needing to count any of the objects. Think about rolling a die. When that die settles, a quick glance tells you…
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