# Illustrative Mathematics

found in :math; preK-2; 3-5; 6-8; 9-12

Illustrative Mathematics  is a collection of 1095 lessons and activities that can be browsed or filtered by standards, subject area (math, physical science, social science) and grade level. Tasks are described and commentary provided. Some activities require resources not supplied, such as books that might be found in classroom or school libraries.

Cave Game Subtraction  Small groups of students (1st grade) use cups and counters (5-20) to practice creating and memorizing subtraction equations, focusing on missing addends.

Halves, Thirds, And Sixths  Students (3rd grade) identify and add unit fractions and recognize equivalent fractions. A PDF of this lesson with blank rectangular arrays is provided.

India's Bathroom Tiles  Students (3rd grade) help India remodel her bathroom. To stay within her strict budget, she must buy no more tiles than she needs. Her bathroom is 5 feet wide and 8 feet long, and she needs to cover the floor with tiles 1 square foot.

Cider versus Juice - Variation 1  Students (7th grade) calculate multiple unit rates of products sold in different units (gal/oz) to determine which is cheapest.

Basketball  (9-12) In the context of a basketball competition between two brothers, students must set up and solve a rational equation (and a rational inequality) in one variable and solve for an unknown variable.