Period histogram of CTTS in NGC 2264 whose CoRoT light curves were classified as AA Tau-like (blue) or spot-like (red). The periods of spot-like light curves represent stellar rotational periods, while those of AA Tau-like light curves represent Keplerian rotation periods at the warp location. The periods of spot-like light curves were taken from the 2011 data, while AA Tau-like light curves from both 2008 and 2011 were used.