Presidents of the United States! Research Task Cards & BINGO Game. This product is a research center containing questions about the current and past presidents. The center includes 24 question cards in both color and black and white, center directions and a worksheet to use during research. The worksheet can be used for one time center participation. There is also an answer document for the students to use if the center will be used over multiple days. The answer document follows along with a set of BINGO cards and bingo pieces. The BINGO cards offers the students a fun way to keep up with correct answers. An answer key for the research questions is included.