Professor Pete’s Gadgets Home Page

K – Grade 2 Apps:

Ten Frames

Explore the numbers to 10, then to 20, using a set of interactive tools based on single and double ten frames. Introduce addition, subtraction and difference between two numbers, in preparation for memorization of number facts in later years.

Easy Place Value

Show numbers up to 99 using pictures of a selection of base ten materials, including bundling sticks, unifix cubes, and marbles. Each material animates to show the transition from 10 ones to 1 ten, and vice versa.

Grade 2-4 Apps:

Odometer

Set places from 3-digit numbers to millions or thousandths; skip count forwards and backwards by 1, 2 or 5 in any place.

Number Expander

Shows numbers to 999 using pictures of either base ten blocks or bundling sticks, plus a text-based expander. After opening parts of the expander, then click the GO button to watch pictures animate to show the equivalence of materials such as 2 tens and 20 ones.

Fraction Counter

Count along a number line with selected fractions. Use this app to explore basic fraction concepts, including conversions between mixed numbers and improper fractions.

Grade 2-6 Apps:

Number Facts

Select either addition or multiplication (up to 10x or 12x). Use the on-screen tools to hide, highlight or factorize numbers; use drop-down boxes to access fact families and thinking strategies.

Number Slide

Multiply and divide whole numbers or decimal fractions by 10, 100 or 1000. The app shows how the digits in a number remain the same, and move left or right into a new position. Decimal fractions can be switched off for students not yet ready for them.

Number Popup

Click individual digits in numbers up to millions to show how each digit represents a specific number of ones, tens, hundreds, thousands, and so on. The text bottom responds by showing an equation that matches the display of places that have been popped up.

Scrolling Hundred Board

Explore numbers from 0 to 2000, one hundred at a time. Use on-screen tools to hide or highlight single numbers, entire rows or columns, or special classes of numbers, such as multiples, prime numbers or square numbers.

Grade 4-6 Apps:

Equivalent Fractions

Enter a common fraction on the left, then select a new denominator to see an equivalent fractions. Also allows for mixed improper fractions with a single whole.

Fraction Converter

Enter a starting fraction as a common fraction, decimal, percentage or ratio. The other boxes will immediately show the equivalent fractions in those forms. Interactive tools allow boxes to be shown or hidden, fractions to be simplified, recurring decimals notated, and so on.

Fraction Addition & Subtraction

Enter two fractions including wholes up to 4 and fractions with selected denominators. Click the forward arrow to walk through the steps to add two fractions, including finding a common denominator, regrouping extra wholes and simplifying the result.