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