Draw or print a copy of a storyboard template. Storyboards can have any number of boxes. When dealing with third graders, you should start simple. Six to ten boxes should be plenty.
Instruct your students to draw a picture inside each box that represents part of the story. The pictures can be as simple or as elaborate as necessary or desired. The order of the pictures also should flow from left to right, just as text is read. If you have multiple rows of boxes, instruct the students to start in the upper left-hand box and move to the right. When one row is done, they should drop down to the box on the far left of the next row.
Ask your students to write simple text inside the boxes. You can have them write text in each box or in a select number of boxes. The text should describe what is happening at the point in the story, as illustrated by the specific box.
Create larger boxes and divide students into groups of three to four children if you plan to make one large class storyboard. Each group can be responsible for creating one box within the board. Assign a specific section of the story for each group to illustrate. Place the boxes together in order when everyone is finished. You can display the creation on the wall in your classroom.