Penpal 2 -

penpal How does it work? PENpal is a barcode reader, with a difference It detects 'micro' barcodes, so small that you can hardly see them and therefore the barcodes

Penpal Penpal is a promise-based library for securely communicating with iframes via postMessage The parent window can call methods exposed by iframes, pass penpal Simpler and Quicker Completing a topic on PenPal Schools often requires multiple class periods ​ On Go Pangea, students simply answer questions by creating