Abstract: A new cutting and chopping board assembly has edges with attachments and removable and repositionable sides with complementary attachments on or in the sides for attaching the sides to the edges of the cutting and chopping board. The sides trap cut and chopped pieces within the sides on the cutting and chopping board. The sides are selectively slidable and repositionable along the edges of the cutting and chopping board. Grooves in edges of the board hold magnets or magnetically attractable material such as stainless steel. The sides hold complementary attachments of magnetically attractable material such as stainless steel or magnets. The attachments and complementary attachments may both be magnets. A tongue and groove embodiment employs grooves in edges of the cutting and chopping board and tongues extending from the sides that extend into the grooves. One or more sides may be removed or slid rearward for cutter or chopper access.