How many of each shape?
Use the number of occurrences per unit to compute totals. Explore a model, explain the relationship, and try it with physical materials.
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Use the number of occurrences per unit to compute totals. Explore a model, explain the relationship, and try it with physical materials.
Predict a distant item by decomposing its position. Explore a model, explain the relationship, and try it with physical materials.
Distinguish units that read the same backward from ones that do not. Explore a model, explain the relationship, and try it with physical materials.
Specify a repeat and a target that a partner can check independently. Explore a model, explain the relationship, and try it with physical materials.
Organize a longer finite unit as the generator of a sequence. Explore a model, explain the relationship, and try it with physical materials.
Connect position number to complete units and a within-unit location. Explore a model, explain the relationship, and try it with physical materials.
Test a proposed shortest generator against the whole order. Explore a model, explain the relationship, and try it with physical materials.
Explain an invariant under a consistent change of symbols. Explore a model, explain the relationship, and try it with physical materials.
Use the generating unit to reconstruct a hidden item. Explore a model, explain the relationship, and try it with physical materials.
Explain why position counting must start at one. Explore a model, explain the relationship, and try it with physical materials.
Multiply complete repeats by occurrences within a unit. Explore a model, explain the relationship, and try it with physical materials.
Use complete groups and remaining places without expanding every item. Explore a model, explain the relationship, and try it with physical materials.