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3 lone pair electron clouds
there is no need for children to fiddle about with the focus
means that most of us spend too much time thinking
It allows a reading of the body temperature from the thermal radiation emitted from the forehead without contact with the body (3 to 7 cm from the skin surface and perpendicular to it)
24 coloured rings
Stile Tray - Pack Of 5 Age 5-6 3 lone pair electron cloudsPack of 5 Stile Trays. The Stile Tray is the key to the self checking activities of the Key Stage 1 P2 3 and 2 programme. Pupils answer the questions by simply placing each of the twelve numbered tiles on the appropriate square on the base of the tray. When all the tiles have been placed, they close the tray, turn it over, and reopen it to reveal a geometric pattern. If the answers are all correct, the pattern will match the one printed at the top of
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