L Blocks (grid 3×2 or 4×4 representation):
eChalk often integrates "Tetris-style" mechanics into other curriculum-aligned games to make learning more engaging. For example: echalk tetrus
: As a resource for schools, it offers a clean interface without the distractions or tracking found in many free online game sites. L Blocks (grid 3×2 or 4×4 representation): eChalk