- General Math
- Measurement
- Probability, Counting and Combinatorics
- Problem Solving (Misc.)
The Iditarod sled-dog race is run on a trail that was originally a mail-supply route. In 1925, part of the trail became a lifesaving highway for the children who lived in Nome. The Iditarod is...
- General Math
- Percents and Fractions
- Problem Solving (Misc.)
The July 4 holiday is one that many people plan their summer vacations around. Peggy works a Monday through Friday job that has the following July 4 holiday policy. If July 4 falls on a weekend...
- General Math
- Problem Solving (Misc.)
Phoenix earns hotel rewards points whenever she stays at a participating hotel. She can then use these points to pay for future hotel stays. For instance, a stay that costs $500 could be paid for...
- Algebraic Expressions and Equations
- Problem Solving (Misc.)
After polling each student in her homeroom about their summer plans, Mrs. Baker discovered that each student planned to participate in one or more of the following activities: Attend summer school...
- General Math
- Proportional Reasoning
In the summer months, a common problem people suffer from is dehydration – not enough water in their body. Waiting until you feel thirsty is not a good indicator that it’s time to drink water. In fact...
- Algebraic Expressions and Equations
- General Math
- Percents and Fractions
- Problem Solving (Misc.)
When Riya’s alarm went off on the first day of her senior year in high school, she hit the snooze button and slept for another 10 minutes. When the alarm sounded the next time, Riya got up and...
- Algebraic Expressions and Equations
- Percents and Fractions
- Problem Solving (Misc.)
Ms. Cross leads The National Math Club at the middle school where she teaches. At the first club meeting of the school year, 60% of the students in attendance were 7th graders. If there was one fewer...
- General Math
- Probability, Counting and Combinatorics
Each week, Devin buys school lunch on Friday because the cafeteria serves pizza every Friday. Monday through Thursday, Devin brings his lunch to school. The lunch he brings always includes a peanut...
- Algebraic Expressions and Equations
- General Math
- Plane Geometry
The Washington Monument in Washington, D.C. is an obelisk. An obelisk is a tall monument with four gently sloping sides and a pyramid shape on top. The obelisk structure first appeared in Ancient...