Here's a template for your Christmas Trees, just adjust theoutline to get the style you want but don't change the inside slot positions. A dab of hot glue from a glue gun will help to stop them from folding flat together ;
Easy Pop Up Christmas Card - Paper Fan Christmas Tree Cards. Working with concertina paper folding techniques, this is a quick and easy card to make for the holidays. traditional Christmas Tree and white Winter Tree Card versions.
Bloom's Revised Taxonomy Action Verbs infographic - e-Learning Infographics - The Bloom's Revised Taxonomy Action Verbs infographic includes some action words that are useful in writing learning objectives.