DIY Chalkboard Organizer from Old Windows

After we replaced the old windows in our house, I really wanted to find a way to repurpose some of the old windows, and especially the living room one, which had many panes. I spend a lot of time wondering what to do with the old frames, and finally I decided to make myself a chalkboard organizer, thanks to a suggestion made by my experienced window cleaners (http://www.paulswindowcleaningmelbourne.com.au/). We are a very busy family, with many lessons, meetings and trainings to attend, and unle