Index Area Calculating angles Coordinates Counting on and back Data handling Decimal number line Difference Division Grid Fixing points Fractions Grouping Isometric grid Line graph Measuring cylinder Measuring scales Moving digits Multiplication facts Multiplication grid Number dials Number facts Number grid Number line Number spinners Ordering numbers Place value Polygon Remainders after division Ruler Symmetry Tell the time Thermometer Twenty cards 
Number lineThis ITP generates a number line. Two markers with numbered boxes can be moved along the number line. Depending on the order of the two markers you can show the sum and difference between the two numbers and the calculation represented. You can hide and reveal the numbers in the boxes, which will also hide and reveal the respective numbers in the calculation. The maximum and minimum values on the number lines can be altered and the numbered intervals can be hidden and revealed. 
Run Number line 1.6 

The ITP can be used to model calculation strategies for addition and subtraction and to develop children’s understanding of the sums and differences between positive and negative numbers. Selecting different scales on the number line and hiding and revealing the numbered intervals can support children’s estimation skills and ability to read horizontal scales.

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Primary National Strategy