English

Elkonin-Davydov frame in teaching science 

Developmental instruction 

Introduction to Chemistry: course for 6-7 graders

Ratio concepts: Buoyancy and Density - a unit for 6-7 graders     

Ratio concepts: Paint mixing - a unit for 3-5 graders (concentration)

Proportions, fractions, number sense for 5-6 graders

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