EASY
AVERAGE
DIFFICULT
100

This psychologist from Russia said learning happens best through social interaction.

Who is Lev Vygotsky?

100

In Piaget’s concrete operational stage, this skill means quantity stays the same even if shape changes.

What is conservation?

100

The psychologist who believed development happens before learning.

Who is Jean Piaget?

200

The Piaget stage that comes after the sensorimotor stage?

What is the preoperational stage?  

200

The first level in Kohlberg’s theory of moral development.

What is the preconventional level?

200

In Kohlberg’s postconventional level, this guides moral choices. 

What are personal moral principles?

300

The first stage in Erikson’s theory for babies.

What is trust vs. mistrust?

300

In Erikson’s theory, the conflict for teenagers aged 12–18.

What is identity vs. role confusion?

300

Vygotsky’s term for the gap between what a learner can do alone and with help.

What is the zone of proximal development?