Bring in a guest speaker or presenter to your class.  Here are some benefits:

1) A new voice echoing the Faith: Whether they come to give a 10 minute testimony or teach a portion of the class it provides a great avenue to have another faith-filled person reinforce the truths of our Faith.

2) It adds variety:  Students like a change of pace.  Even though you are a great catechist, having someone else present allows your students to experience someone different than usual.

3) Keeps kids engaged: A new voice and unfamiliarity with that person will allow for a renewed focus from your students.  Students are more attentive around an adult that is new to them verses that same two catechists each week.

Providing opportunities for your students to encounter other individuals is a good way to Being a catechist is a challenging and rewarding ministry all at the same time.