Concord’s cup stackers have gone international! Thursday was the worldwide Stack Up event, where students in 35 countries tried to break the world record for most people cup stacking in a given day. The goal was 600,000, and as of this writing, the predicted count was 599,677 – plenty good to beat the previous record of about 555,000 (though the official count is still pending). Beaver Meadow and Rundlett were two of 14 New Hampshire schools to take part.