Teaching math can be challenging, especially when it comes to fractions. Adding three or more fractions with unlike denominators can be particularly difficult for students. However, there are several engaging activities that teachers can use to help their students master this concept.

1. Fraction Bingo: This classic game can be adapted to help students practice adding fractions. Create bingo cards with sums of three or more fractions written in them. Then, give students a set of cards with different fractions on them. Students must add the fractions together and cover the corresponding sum on their bingo card if it appears.

2. Fraction War: This activity is a twist on the traditional card game. Divide students into pairs and give each pair a set of cards with different fractions on them. Each student draws two cards and adds the fractions together. The student with the larger sum wins the cards. The student with the most cards at the end of the game wins.

3. Fraction Matching: Create a set of cards with different fractions on them. Students must match fractions that have common denominators and add them together. For fractions with unlike denominators, they must first find a common denominator before adding them together.

4. Fraction Escape Room: This activity is a fun and interactive way to teach students about adding fractions. Create a set of clues and puzzles that students must solve in order to escape the room. Each clue involves adding three or more fractions with unlike denominators.

5. Fraction Relay Race: Divide students into teams and set up a relay race course. Each team must complete a set of fraction addition problems before passing the baton to the next student. The team that completes the course first wins.

Overall, these activities are effective and fun ways to teach students how to add three or more fractions with unlike denominators. By engaging in these activities, students will improve their understanding and increase their confidence in math.