Illustrative Mathematics
Discounted Books
Adolescents love to shop, especially when an item is discounted. Here, shoppers only have a set amount of money to spend. Will they be able to make a purchase with the discount and tax added in? Percent discounts can be calculated...
101 Questions
Foreign Subway Order
Subway orders are the same in every language, right? An inquiry-based lesson presents a Subway ordering board from an Asian country. Given an order, learners must determine the cost by comparing symbols of the order to the symbols on the...
Computer Science Unplugged
Treasure Hunt—Finite-State Automata
Introduce your class to the concept of finite-state automata with an activity that asks individuals to try to map their way to Treasure Island by taking different routes though an island chain. Each island has two ship sailing...
Curated OER
Comparing Fractions
Learners compare three sets of fractions using the greater than, less than, and equal signs. To justify their answers, a drawing is also required that illustrates their reasoning. Including fractions with like and unlike denominators, as...
Illustrative Mathematics
Kimi and Jordan
Kimi and Jordan have taken summer jobs to supplement their weekly allowances. Kimi earns more per hour than Jordan, but Jordan's weekly allowance is greater. This activity asks students to determine how the incomes of the two workers...
Illustrative Mathematics
Finding Common Denominators to Add
Finding common denominators is an important strategy when adding fractions with unlike denominators. In the first two questions in this three-question task, fifth graders are asked to combine fractions and draw a picture to show their...
National Council of Teachers of Mathematics
The Roll Out Fractions Game: Comparing Fractions
Reinforce the concept of comparing fractions with a hands-on, two-player game that calls for a visual model, score board, and dice. Players roll dice to acquire their given fraction, create the fraction using fraction tiles, then...
Help Algebra
Help algebra.com: Translating Expressions
This resource discusses translating verbal expressions to variable expressions. It explains how to look for key words, then gives an example of the process in great detail.
University of Cambridge
University of Cambridge: Nrich: The Pi Are Square
Use the formula given for the area of a circle and a square to solve this challenge. This one page website has the solution available for you.
University of Regina (Canada)
University of Regina: Math Central: Reversing the Inequality Symbol
In response to a student question regarding the reversing of the inequality symbol, a method is presented in how one can avoid reversing the symbol.