Here are some Free TPT Resources for Halloween.
Halloween Writing Prompts

Measuring Ghosts and Spiders Activity

Halloween Noun Sorting

Reading Comprehension Halloween Passages and Questions

These websites have a collection of Halloween themed learning activities.

Online Crossword
https://www.247crossword.com/halloween/

Printable Crosswords
https://pjsandpaint.com/printables/free-printable-halloween-crossword-puzzle/

Crosswords, Word Search, and Sudoku
https://www.puzzles-to-print.com/halloween-puzzles/halloween-crossword.shtml

PBS Kids Halloween Games: https://pbskids.org/games/halloween

BaamBoozle Halloween Game
https://www.baamboozle.com/game/700073

Here are some options for Halloween music in class from YouTube:https://youtu.be/XZqR0elEZ84 (Elementary sing along style) 

Halloween Songs from 100 years ago https://www.youtube.com/watch?v=ColqqmE-0qM

Spooky instrumental background music
https://www.youtube.com/watch?v=-EZ517Ls_FE

A Night in Dracula’s Castle Instrumental music
https://youtu.be/GbDAjpW2FmE

Trick or Treat Lo-Fi Chill Beats
https://youtu.be/3b1E5goMT3c

Here is a fun option to carve a virtual pumpkin with your kids. https://www.abcya.com/games/pumpkin_carving

Here are some cool pumpkin patterns and Halloween Games
http://www.spookmaster.com/index.htm

Here are some digital coloring pages.
http://www.apples4theteacher.com/coloring-pages/halloween/
If you want to go old school there is also an option to print the coloring sheets. Virtual teachers you can assign these in ClassKick and have students color them digitally.

https://www.getepic.com/app/search#

search Epic Books for tons of Halloween eBooks.

Check out these Halloween Kids jokes for some cheesy fun.
https://redtri.com/funny-bones-halloween-jokes-for-kids/slide/1