Unlike many other rapid transit systems, BART does not have an unlimited ride pass, and the only discount provided to the public is a 6.25% discount when "high value tickets" (only available on Clipper) are purchased with fare values of $48 and $64, for prices of $45 and $60 respectively. Amtrak's Capitol Corridor and San Joaquins trains sell $10 BART tickets on board in the café cars for only $8, resulting in a 20% discount. A 62.5% discount is provided to seniors, the disabled, and children age 6 to 12. Middle and high school students 13 to 19 may obtain a 50% discount if their school participates in the BART program; these tickets are intended to be used only between the students' home station and the school's station and for transportation to and from school events. The tickets can be used only on weekdays. These School Tickets and BART Plus tickets have a last-ride bonus where if the remaining value is greater than $0.05, the ticket can be used one last time for a trip of any distance. Most special discounted tickets must be purchased at selected vendors and not at ticket machines. The BART Plus tickets can be purchased at the ticket machines.