Primary National Strategy - Interactive Teaching Programs


Calculating angles
Counting on and back
Data handling
Decimal number line
Division Grid
Fixing points
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
Remainders after division
Tell the time
Twenty cards


This ITP displays a thermometer. The scale, range and the interval markers can be changed and a slider control can be dragged up and down the length of the thermometer to set the height of the column. A second marker indicates the last reading so that comparisons can be made. This marker can be fixed in position if required. The positive or absolute difference between two values can be displayed, and the change in the temperature as the marker is moved.

Run this ITPRun Thermometer 1.7
thermometer controls

The ITP can be used to develop children's understanding of vertical scales and negative numbers in the context of temperature. The slider controls can be used to introduce and model strategies for addition and subtraction that involve positive and negative numbers. The language of number can be developed, giving meaning to calculations such as subtract negative 3 from negative 7.

scale adjustment controls
Use the pointers to adjust the way the scale is displayed.
Maximum from 20 to 50

Minimum from 30 to 40

The interval markers on the scale can be displayed at every 1, 2, 5, or 10.

marker positionFix or unfix the position of the marker.

show value controlHide or show the value indicated by the slider.

show absolute difference controlShow or hide the absolute difference in value between the slider and the marker (always a positive value).

show difference controlShow or hide the change in value between the slider and the marker (can be a negative value).

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Copyright 2005 Primary National Strategy