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### 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.

### 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.

### 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.