This Sunday, December 4th, from 9:00 a.m. to 6:00 p.m., you can assist the school financially by saying at the checkout "I would like to support P.S. 230" before making your purchase. Or you can print out the flyer that's above and give one of the vouchers to the cashier.
A percentage of the day's sales will be donated to the school. It's a free way for you to give.
The bookstore is also having some free events that day, including story times and craft projects from 11:00 a.m. to 3:00 p.m.
If you'd rather make your purchases online, from December 4th to December 9th, you can donate to the school by using Bookfair ID number 11983137.
The Park Slope Barnes & Noble is at 267 7th Avenue, between 5th and 6th streets. (map)