NRICH's Lower Secondary – Thinking Mathematically module is full of challenging activities organized into sets that focus on the processes of solving math problems, rather than on the individual math skills being covered. Kids must think critically as they tackle these content-rich problems. Areas of focus include strategic thinking, modeling, exploring, posing questions, reasoning, justifying, and more. These activities are best for kids in grades 5-12, though many can be used in lower grades for more advanced students. Because of the challenging nature of the problems, it's ideal if kids can work in small groups to solve them. Assign an activity, ask students to share their results with the class, and then review the solution together as a whole class -- just make sure that kids don't read the solution, first. Some activities require hands-on materials, so plan ahead.Continue reading Show less
Key Standards Supported
- HSN.Q .1
Use units as a way to understand problems and to guide the solution of multi-step problems; choose and interpret units consistently in formulas; choose and interpret the scale and the origin in graphs and data displays.
- HSN.Q .3
Choose a level of accuracy appropriate to limitations on measurement when reporting quantities.
The Number System
Find the greatest common factor of two whole numbers less than or equal to 100 and the least common multiple of two whole numbers less than or equal to 12. Use the distributive property to express a sum of two whole numbers 1–100 with a common factor as a multiple of a sum of two whole numbers with no common factor. For example, express 36 + 8 as 4 (9 + 2).
Apply and extend previous understandings of multiplication and division and of fractions to multiply and divide rational numbers.
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