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Grades K–2 · Systems

How do track pieces make a route?

Track pieces make a route when their ends join. In this picture, four toy-track pieces lead from the train to a finish flag. The rails meet at each join.

S18 visual explanation4 of four pieces can be followed from the start without crossing a gap. The route reaches the finish.Locate the partsFour toy-track pieces1234StartFinishFollow the rails, including each joinThe route reaches the finish

In the diagramLocate the partsFour toy-track pieces1234StartFinishFollow the rails, including each joinThe route reaches the finish

All four pieces are joined into one straight route. The rails connect the toy's start to the finish flag.

A toy guided along those rails can go from one piece to the next. A gap would break the route. Having four pieces is not enough if their ends do not meet.

A joined route can be straight or have a bend. It does not need to be a circle. It needs a connected path all the way from the start to the finish.

About this explanation

Starting knowledge: Count to four and follow a pictured path from one end to another with support.

Sources

  • LEGO Education — Train Time
  • NGSS / National Science Teaching Association — K-2-ETS1-2 Engineering Design
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