Most children acquire an understanding of the natural world well before they receive their first science lesson, research suggests. They know that solid objects cannot move through each other, that ...

This report details the development of a learning progression for the understanding of fractions. The intended use of the learning progression is to support formative assessment practices for children ...

This report details the development of a learning progression for the understanding of fractions. The intended use of the learning progression is to support formative assessment practices for children ...

Teachers are the first to tell you whether PD is worth their time…and our teachers are asking for more of this professional ...