Hint 1: By changing your point of view the solution might become more obvious. The following is the same puzzle turned 45 degrees

Or scroll down for more hints

Hint 2: Here’s a match you can move

Solution: here are the two moves

Activity 2 Solution:

Activity 3 Solution:

Activity 4 Solution:

Activity 5 Solution: A really tricky one. It requires a new move:  just sliding one stick across by half its length.