This is a package of helpful handouts that is a "go to" before teaching any assignment that requires students to grid for accuracy.
It includes a bunch of templates of a small image that has a grid over it, which students then have to grid on the larger gridded template below - so they learn how to enlarge an image successfully.
They also learn how to be careful with perspective, and go square-by-square to achieve accuracy.
It's so simple, but so helpful!
It's a MW document so of course you can add in your own (just insert your image behind the top template).
There's 15 total, with a range of subjects (from Batman to a lotus flower!) and a range of difficulty.
Students always enjoy this - seeing how accurate they can be with this ancient technique of the grid.