A straight lecture on cell structures is torture for students. To remedy this, I designed a system of flashcards where each organelle is represented by 3 types of cards: a picture card, a structure card, and a characteristic card. Cards have alignment hints for the other two cards. Each group of 4 students is given one set of 36 cards. They work together to align the 3 cards for each organelle. While groups are engaged in collaborative work to tease out details about each organelle, I can work more closely with each student as they learn to critically evaluate card content. Once all cards are correctly aligned, each student completes a structure/function table. Writing down what is learned kinesthetically promotes transference of learned information from short term to long term memory. In Fall 2015 (prior to card use), 64% of students missed one or more questions on cell biology. In Fall 2016, card use lowered this proportion to 39% on the same or similar exam questions. I have replaced other mundane lectures with this system (e.g., biomes and surveys of Kingdoms) to the relief of my students!