Sorting (Progressive Exercises)
Materials:
- Tray 
- Identical containers for each set of objects 
- Larger container that fits all objects together 
- A blindfold 
Objects for level 1:
Sets of familiar objects that fit in the child’s hand and can be distinguished by feeling. Start with a variety of two different objects and then three, such as sets of buttons, shells, small wooden geometric shapes, etc.
Objects for level 2:
Sets of medium-size grains that are large enough to be visible when the child holds one between their fingers, such as beans or other grains of similar size. Start with a variety of three to five different objects with five to ten in each set.
Objects for level 3: Discrimination of Grains
Small grains/seeds the size of rice that are not visible when the child holds one between their fingers. Start with a variety of four objects with only a few of each.
Purposes: Refinement of the stereognostic perception
Age: 3 and up
Preparation:
- Level 1-the child has worked with the geometric solids and has experienced the stereognostic perception 
- Level 2 and 3 is experience with the level prior. 
Presentation 1: Level 1
- Invite the child for a lesson on sorting. Show them how to carry the tray, replace it on the shelf and invite them to carry it to a table. You will bring a blindfold and two tissues. 
- Put on the blindfold. 
- Keep the non-dominant on the edge of the center bowl as a point of reference. With the dominant hand, choose a shell from the center tray and feel it using the whole hand. 
- Indicate that variety will go in a specific dish. Repeat for the other type. 
- Continue to sort until the center bowl is empty. Remove the blindfold and visually check. 
- Replace the shells in the center bowl. Invite the child to sort. Encourage repetition. 
- Fade and observe. 
Presentation 2: Level 2
- Same process as Level 1. 
Presentation 3: Level 3
- Same process as Level 1. 
Control of Error:
- The child’s own judgment/visual discrimination 
Language: Names of contents being sorted
Following Exercises: None
Memory Games: None
Pedagogical Notes:
- You can create a visual sorting to be done without a blindfold. This is a great exercise for a transition shelf. Include a variety of items that the child would see in their homes such as silverware, keys, etc. 
- All three sorting exercises can be on the shelf simultaneously. 
- Rotate the objects to be sorted to generate interest to encourage repetition. 
- These types of exercises help children organize and classify information they have in their minds. 
