University of Cambridge
University of Cambridge: Nrich: Count the Trapeziums (Trapezoids)
The challenge at this one page website, is to see how many trapezoids (British-trapeziums) you can find in the figure. When you have your results, you can easily check it right at the website.
Help Algebra
Help algebra.com: Problem Solving Strategies
The steps for solving word problems are presented here along with suggestions of how to carry out each step. Learn how to understand, plan, write equations, solve and check each time you work a word problem.
National Council of Teachers of Mathematics
Nctm: Figure This: How Much Time Do Teens Spend on the Job?
Try this math challenge where you investigate the average number of hours teen actually spend working. Apply your problem solving, number sense, and computation skills in this one page activity from the NCTM Math Challenges for Families...
University of Cambridge
University of Cambridge: Nrich: Appearing Square
The challenge presented at this one-page website offers an opportunity to work with the area of a rectangle. The solution is available right on the website.
Other
Learning Network: Absurd Math
Prealgebra students practice their math skills by playing the interactive game series. Math questions must be solved correctly in order to move to the next level of the science-fiction game.
National Council of Teachers of Mathematics
Nctm: Figure This: Who Wins the Game?
A math challenge for the basketball enthusiast. This NCTM Math Challenges for Families activity focuses on the concept of probability. Test your problem solving aptitude as you try to figure out who will probably win the game.
Other
Math Stories: Write a Number Sentence
At this one page site you can work through step by step a sample problem that illustrates the problem solving strategy for "Write a number sentence." The answer is right there to help you check your thinking.
Curated OER
Diagram Showing the 7 Seven Step Problem Solving Cycle
Although written for the university level student, this article provides good ideas for all learners about problem solving skills. It provides a definition as well as a seven step process for how to problem solve.