Teachers may a projector system to present the Calendar Questions to the whole group during a math mini-lesson.. The calendars on the slide cards will help students understand how to use a calendar. The slides can be printed and laminated to use with small groups, Tier Instructions, or in math centers. Each calendar card asks a student to look for different information on the calendar. My students love the truth or lie cards where they decide if the information on the card is true or false. Blank calendars are included to help students create their own calendar.