This is a set of 24 flashcards meant to be used with the "Correct Shares" activity in Teaching Student Centered Mathematics by John A. Van de Walle and LouAnn H. Lovin. The activity aligns with standard 1.G.A.3, partition circles and rectangles into two and four equal shares. Print, cut, and laminate the cards for durability. Show students one card at a time and ask them if the card shows equal parts (halves, fourths). The key component of this activity is the discussion of the non-examples.