Objective: Students apply their understanding of a concept by identifying parts of a diagram.
Diagrams support visual learners by showing how something works and the relation between parts. Labeling a diagram requires applying knowledge of a concept. It is an effective form of self assessment, enabling, students to check their own understanding.
Labeling a diagram serves as useful feedback to a teacher, too, as it provides information about what students understand and what they still need to learn. a drawing intended to explain how something works.
Diagrams range in complexity from very simple to deeply intricate, and so labeling diagrams is an activity that is appropriate at all grade levels and in many subject areas. For example, at the early grades, students may be tasked with labeling the parts of a plant, while at upper grades they are challenged to label elements of and objects.

This app is made for all ages and groups. you just need to label different parts of digram.