How do you implement art into the Montessori classroom? Start with calendars and posters displayed around the classroom environment. Hang them at the children's eye level, so that they can more easily view them. Rotate them throughout the year instead of hanging them all at once. Be sure to include a variety of artists and styles in your collection. Let children experience them on their own.
Cut apart calendars. Mount and laminate the smaller pictures from the back of the calendar. Do the same for the larger calendar pages. Divide the cards up into groups of 5 or 6 so that it is manageable. Now you have a big-to-little matching activity.
Use the Child-Size Masterpieces series by Aline D. Wolf. Her matching and sorting sets teach children to recognize different works of art, as well as their genres and the artists. You can also use bingo games or make your own dominoes out of stickers.
Put out books for the children to independently look at. One of my favorite series for the children to use is the Mini Masters series of board books. Each one features real paintings by famous artists, all accompanied by a fun rhyme.