Downloadable Perplexing Puzzles for Grade Levels 1-2. 4 fun & Perplexing Puzzles for Grade 1-2?s!. Download, Print & Play!. 4 fun puzzles with answers that involve challenging & interesting math problems to engage and motivate elementary school aged children in building their math skills.. Edx Education continually works with pedagogy mathematics teaching expert Dr Paul Swan to create learning materials that help young minds learn & enjoy math www.drpaulswan.com.au