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Free Hard Puzzles
Free worksheets, coloring pages, mazes, word searches, dot-to-dots, tracing and cut-and-sort sheets for every grade from Preschool to Grade 12, at easy, medium and hard levels. Every one is a free PDF on US Letter or A4, with a low-ink option. Answer keys are separate pages for grown-ups.
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- Letter or A4
- Low-ink option
- Answer keys for grown-ups
130 printables · showing 97–120
Cryptogram: power user shortcuts
Typing & Digital Skills · Grade 8 · Puzzle · 1 page
Debugging like a pro crossword
Coding · Grade 8 · Puzzle · 1 page
Human body systems crossword
Science · Grade 8 · Puzzle · 1 page
Objects and classes word search: 14 words
Coding · Grade 8 · Puzzle · 1 page
Pigpen code: engineering design
Science · Grade 8 · Puzzle · 1 page
The Constitution and Bill of Rights word scramble with a secret word
History, Civics & Social Studies · Grade 8 · Puzzle · 1 page
Cryptogram: history of the atom
Science · Grade 9 · Puzzle · 1 page
Cryptogram: the Industrial Revolution
History, Civics & Social Studies · Grade 9 · Puzzle · 1 page
Earth systems word scramble with a secret word
Science · Grade 9 · Puzzle · 1 page
Ergonomics word search: 14 words
Typing & Digital Skills · Grade 9 · Puzzle · 1 page
Operating systems word search: 14 words
Computers & Digital Literacy · Grade 9 · Puzzle · 1 page
Pigpen code: careers in computing
Computers & Digital Literacy · Grade 9 · Puzzle · 1 page
Web development word search: 14 words
Coding · Grade 9 · Puzzle · 1 page
Account security word scramble
Typing & Digital Skills · 10–11 · Puzzle · 1 page
Caesar cipher: human rights worldwide
History, Civics & Social Studies · Grade 10 · Puzzle · 1 page
Computer architecture crossword
Computers & Digital Literacy · Grade 10 · Puzzle · 1 page
Cryptogram: ecology and biodiversity
Science · Grade 10 · Puzzle · 1 page
Data structures crossword
Coding · Grade 10 · Puzzle · 1 page
DNA and molecular genetics crossword
Science · Grade 10 · Puzzle · 1 page
Encryption word search: 14 words
Computers & Digital Literacy · Grade 10 · Puzzle · 1 page
Caesar cipher: immunity and vaccines
Science · Grade 11 · Puzzle · 1 page
Databases word search: 14 words
Computers & Digital Literacy · Grade 11 · Puzzle · 1 page
Document formatting crossword
Typing & Digital Skills · Grade 11 · Puzzle · 1 page
Macroeconomics: GDP, inflation and interest word search: 16 words
History, Civics & Social Studies · Grade 11 · Puzzle · 1 page
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