1. Paper Bats: Cut out bat shapes from black construction paper and hang them from the ceiling or walls.

2. Ghost Streamers: Hang white streamers from the ceiling and draw ghost faces on them.

3. Spider Webs: Use white yarn to create spider webs in corners or on bulletin boards.

4. Jack-o’-Lanterns: Carve or draw pumpkin faces on orange construction paper and display them around the classroom.

5. DIY Monster Footprints: Cut out footprints from colored construction paper and place them on the floor leading to the classroom.

6. Ghost Balloons: Draw ghost faces on white balloons and hang them around the room.

7. Creepy Crawlies: Place plastic spiders, bugs, and other insects around the classroom.

8. Halloween Door Decorations: Decorate the classroom door with spooky themes like witches, ghosts, or bats.

9. Mummy Mason Jars: Wrap mason jars with white bandages to create mummy-themed decorations.

10. Pumpkin Garland: Cut out pumpkin shapes from orange construction paper and string them together to create a garland.

11. Spooky Silhouettes: Cut out spooky silhouettes like bats, cats, or witches from black construction paper and display them on windows or walls.

12. Witch Hat Decor: Display witch hats on shelves or hang them as decorations.

13. Haunted House Lanterns: Decorate small lanterns with Halloween-themed stickers or cutouts and place LED tea lights inside.

14. Candy Corn Banner: Create a banner using colored paper in the shape of candy corn.

15. Witch Brooms: Use sticks and twigs to create miniature witch brooms and place them on desks or tables.

16. Ghost Pops: Attach round white lollipops to white tissue paper with a string to create ghost lollipop decorations.

17. Frankenstein’s Monster Door: Decorate the classroom door with a Frankenstein’s monster face using green, black, and white construction paper.

18. Potion Bottles: Repurpose empty glass bottles and fill them with colored water to resemble magical potions.

19. Halloween Wreath: Create a Halloween-themed wreath using orange and black ribbons, plastic spiders, and miniature pumpkins.

20. Skull Centerpieces: Use plastic or foam skulls as centerpieces on desks or tables.

21. Spooky Classroom Tree: Decorate a small tree with orange and black ornaments, bats, and ghosts.

These affordable and spooky decorations will make your classroom ready for Halloween while staying within budget. Happy decorating!