This is a set of task cards that give students practice with identifying supporting details with a main idea. This set contains 23 cards. Each card has a main idea and four supporting details. . Students have to determine which detail does NOT support the main idea.. These cards can be used for independent practice, as a literacy center activity, as game cards, or for take-home practice. Task cards are also a great resource to use for reading intervention as well. Depending on your students' skill levels, these cards can be used with students in second grade through fourth grade. Print on cardstock and/or laminate for repeated use.