Sorry I don't have progress pictures of this. I taped off my rectangle to fit the space I wanted and rolled it with chalkboard paint. Then I measured out my grid and marked it with chalk. This is where you can sketch out on paper how you want your calendar to look. I only made one notes section but you can also divide up spaces for each family member to have a spot. If you have a busy schedule make your calendar weekly instead of monthly.
I used a white paint pen and a yard stick to trace my lines out. I also recommend you tape off a border and paint it with a semigloss paint so it will be easy to wipe off. Chalk painting is highly addictive so BEWARE and have fun with it!