Use Order of Operations by iDev Books in the classroom for targeted practice. Take some time to adjust the settings according to kids' skill levels. If you have enough devices, kids should practice independently. Alternatively, they can share devices and take turns after evaluating a given number of expressions. Circulate as students practice so you can get a sense of their progress. Advanced students can create and save their own expressions and have partners evaluate them.Continue reading Show less
In this cleanly designed app, there are two options on the main screen: Explore the Rules and Evaluate Expressions. When kids choose Explore the Rules, they can tap on mathematical symbols to read the rules for following the order of operations when evaluating expressions. Kids can also tap on Help to read about the "Boss Triangle," which summarizes all of the rules. Operations are displayed in a triangle to highlight their importance, with exponents at the top of the triangle and addition and subtraction at the bottom. When kids choose the Evaluate Expressions option from the main screen, they are given expressions with multiple operations to evaluate. Kids tap on the part of the expression they want to solve first. For example, in the expression (2 + 5) – 3 + 8, kids would tap on the addition symbol inside the parentheses since this follows the rules for the order of operations. A selection of values appears at the bottom of the screen, and kids select the correct value for this part of the expression. So, in the example (2 + 5) – 3 + 8, kids would select 7 to solve the first step. They continue until the expression has been completely evaluated. If kids tap on the incorrect part of the expression, feedback appears to guide them in the right direction. In Settings, users can customize problems with options such as maximum numbers in each expression, allow negative numbers, allow decimals, allow exponents, and more. Users can also enter and save their own problems.
Order of Operations by iDev Books is an excellent tool for targeted practice. And kids are doing more than just memorizing concepts: Comprehension is strongly supported by the visual display of each step as kids evaluate expressions. Immediate hints guide kids who struggle to remember and follow the rules, and the options to set varying levels of difficulty make it easy for kids with varying abilities to use the tool. A program for scoring results and tracking progress would boost the learning potential and make this an even more valuable classroom tool.
Key Standards Supported
Expressions And Equations
Write and evaluate numerical expressions involving whole-number exponents.
Evaluate expressions at specific values of their variables. Include expressions that arise from formulas used in real-world problems. Perform arithmetic operations, including those involving whole- number exponents, in the conventional order when there are no parentheses to specify a particular order (Order of Operations). For example, use the formulas V = s3 and A = 6 s2 to find the volume and surface area of a cube with sides of length s = 1/2.
Number And Operations In Base Ten
Multiply one-digit whole numbers by multiples of 10 in the range 10–90 (e.g., 9 × 80, 5 × 60) using strategies based on place value and properties of operations.
Fluently multiply multi-digit whole numbers using the standard algorithm.
Add, subtract, multiply, and divide decimals to hundredths, using concrete models or drawings and strategies based on place value, properties of operations, and/or the relationship between addition and subtraction; relate the strategy to a written method and explain the reasoning used.
Fluently add and subtract multi-digit whole numbers using the standard algorithm.
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