Two pieces become a train
Join two small lengths and count every unit once. Explore a model, explain the relationship, and try it with physical materials.
Ten Pre-K lesson drafts for exploring number trains through models, conversation, and hands-on practice. Try three complete free sample lessons. A paid adult account opens all teaching guides, printable PDFs, and learning tools.
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Join two small lengths and count every unit once. Explore a model, explain the relationship, and try it with physical materials.
Align starting ends before deciding which train is longer. Explore a model, explain the relationship, and try it with physical materials.
Notice that reversing two parts preserves their total length. Explore a model, explain the relationship, and try it with physical materials.
Fill a visible length gap with a matching rod. Explore a model, explain the relationship, and try it with physical materials.
Replace a rod by smaller parts without changing the whole. Explore a model, explain the relationship, and try it with physical materials.
Transfer one unit between two parts while preserving the total. Explore a model, explain the relationship, and try it with physical materials.
Connect a spoken before-and-after story with two visible parts. Explore a model, explain the relationship, and try it with physical materials.
Distinguish the number of objects from the length they cover. Explore a model, explain the relationship, and try it with physical materials.
Make equal small groups by repeating one rod. Explore a model, explain the relationship, and try it with physical materials.
Collect different two-part solutions using objects and adult recording. Explore a model, explain the relationship, and try it with physical materials.