Finding learning materials online can be quite a challenge, especially if teaching involves Geographical locations. Why not try something that students of all ages are interested in? That's right - online games! With this Crossword puzzle online on countries in Europe - Croatia, Slovakia, Estonia, Denmark, Netherlands, Moldova, every parent, and educator can help students understand the topic better while letting them have fun and probably a friendly competition with their classmates! Just make sure to discuss the topics thoroughly before letting them play online games, as these are to supplement the students' needs and increase their understanding of the subject matter. 2nd, 3rd, 4th, 5th, 6th, grade social studies game.