Cut out and put together geometric shapes such as triangles to form a square Halloween picture. Recommended for first to third grade.
To practice sorting and identification of shapes, give each student two puzzle worksheets, one with triangles and one with non-triangles. Cut out and mix up the shapes.
Have them sort the shapes into triangles and shapes with more than three sides. Then make TWO squares, one from each set of shapes.
Follow-up activity: Students create or cut out square Halloween pictures and then cut up the squares to make a jigsaw puzzle. Set conditions such as,
"All your pieces must be triangles," or "None of your pieces can be triangles,", or "All your pieces must have four sides."