I do this before creating anything! This makes it so the page prints out portrait style on a regular piece of copy paper. This will give you a normal page in PowerPoint that you can print on regular copy paper. Under SLIDES SIZED FOR, select LETTER PAPER (8.5 x 11 in) and under ORIENTATION, click on PORTRAIT. I prefer to make the page 'Portrait' by clicking on DESIGN at the top and then the drop-down box SELECT SIZE and then CUSTOM SLIDE SIZE.
When you open a new presentation, it will most likely default to 'Widescreen' and be widescreen sized and landscape. This is the most tech-y seeming step but I promise it's easy and, once you do it once or twice, you'll be able to do it in your sleep.
Step 1: Open a new, blank PowerPoint slide and make it paper sized
If you want to see the math activities on the board, I show those fun activities in action in my Building Number Sense in First Grade post with a ton of ideas for how to introduce numbers in the beginning of the year!
