"Valentine Conversation Heart Math" is a great way to teach counting, estimation, sorting, graphing, tallying and data collection & analysis in a fun and "sweet" way. It can be done in small groups with parent volunteers/aides or as a whole class lesson. All of the worksheets and directions sheets are included (as described on directions sheet). No prep other than copying and buying a class set of 1 ounce Conversation Heart candy boxes . I do this activity around Valentine's Day for an extra fun treat.